SPOTTSWOOD W. ROBINSON, III, Circuit Judge:

 Indicted for second-degree murder, and convicted by a jury of manslaughter as a lesser included offense, Bennie [p. 1225] L. Peterson urges [several] grounds for reversal. He asserts . . . that the evidence was legally insufficient to establish his guilt of manslaughter, and that in consequence the judge erred in denying his motion for a judgment of acquittal.  He complains [also] that the judge twice erred in the instructions given the jury in relation to his claim that the homicide was committed in self-defense. One error alleged was an instruction that the jury might consider whether Peterson was the aggressor in the altercation that immediately foreran the homicide.  The other was an instruction that a failure by Peterson to retreat, if he could have done so without jeopardizing his safety, might be considered as a circumstance bearing on the question whether he was justified in using the amount of force which he did.  After careful study of these arguments in light of the trial record, we affirm Peterson's conviction.

    I

 The events immediately preceding the homicide are not seriously in dispute.  The version presented by the Government's evidence follows. Charles Keitt, the deceased, and two friends drove in Keitt's car to the alley in the rear of Peterson's house to remove the windshield wipers from the latter's wrecked car.  While Keitt was doing so, Peterson came out of the house into the back yard to protest. After a verbal exchange, Peterson went back into the house, obtained a pistol, and returned to the yard.  In the meantime, Keitt had reseated himself in his car, and he and his companions were about to leave.

 Upon his reappearance in the yard, Peterson paused briefly to load the pistol.  "If you move," he shouted to Keitt, "I will shoot." He walked to a point in the yard slightly inside a gate in the rear fence and, pistol in hand, said, "If you come in here I will kill you." Keitt alighted from his car, took a few steps toward Peterson and exclaimed, "What the hell do you think you are going to do with that?"  Keitt then made an about-face, walked back to [p. 1226] his car and got a lug wrench. With the wrench in a raised position, Keitt advanced toward Peterson, who stood with the pistol pointed toward him. Peterson warned Keitt not to "take another step" and, when Keitt continued onward shot him in the face from a distance of about ten feet.  Death was apparently instantaneous. Shortly thereafter, Peterson left home and was apprehended 20-odd blocks away.

 This description of the fatal episode was furnished at Peterson's trial by four witnesses for the Government.  Peterson did not testify or offer any evidence, but the Government introduced a statement which he had given the police after his arrest, in which he related a somewhat different version. Keitt had removed objects from his car before, and on the day of the shooting he had told Keitt not to do so. After the initial verbal altercation, Keitt went to his car for the lug wrench, so he, Peterson, went into his house for his pistol. When Keitt was about ten feet away, he pointed the pistol "away of his right shoulder;" adding that Keitt was running toward him, Peterson said he "got scared and fired the gun. He ran right into the bullet." "I did not mean to shoot him," Peterson insisted, "I just wanted to scare him."

 At trial, Peterson moved for a judgment of acquittal on the ground that as a matter of law the evidence was insufficient to support a conviction. The trial judge denied the motion. After receiving instructions which in two respects are challenged here, the jury returned a verdict finding Peterson guilty of manslaughter. Judgment was entered conformably with the verdict, and this appeal followed.

* * *

    III

 More than two centuries ago, Blackstone, best known of the expositors of the English common law, taught that "all homicide is malicious, and of course, amounts to murder, unless . . . justified by the command or permission of the law; excused on the account of accident or self-preservation; or alleviated into manslaughter, by being either the involuntary consequence of some act not strictly lawful, or (if voluntary) occasioned by some sudden and sufficiently violent provocation.

 Tucked within this greatly capsulized schema of the common law of homicide is the branch of law we are called upon to administer today. No issue of justifiable homicide, within Blackstone's definition is involved. [n. 35] But Peterson's consistent [p. 1229] position is that as a matter of law his conviction of manslaughter-alleviated homicide-was wrong, and that his act was one of self-preservation-excused homicide. The Government, on the other hand, has contended from the beginning that Keitt's slaying fell outside the bounds of lawful self-defense. The questions remaining for our decision inevitably track back to this basic dispute.
 

35. By the early common law, justification for homicide extended only to acts done in execution of the law, such as homicides in effecting arrests and preventing forcible felonies, and homicides committed in self-defense were only excusable.  The distinction between justifiable and excusable homicide was important because in the latter case the slayer, considered to be not wholly free from blame, suffered a forfeiture of his goods. F. Wharton, Homicide § 3 at 211 (1855). However, with the passage of 24 Henry VIII, ch. 5 (1532), the basis of justification was enlarged, and the distinction has largely disappeared. More usually the terms are used interchangeably, each denoting a legally non-punishable act, entitling the accused to an acquittal.

36. The common law continues in force in the District of Columbia save to the extent that it is replaced by or is inconsistent with an act of Congress. D.C.Code § 49-301 (1967). See also United States v. Wharton, 139 U.S.App.D.C. 293, 296, 433 F.2d 451, 454 (1970); Hopkins v. United States, 4 App.D.C. 430, 436 (1894).
40. When we speak of deadly force, we refer to force capable of inflicting death or serious bodily harm.

 Here the parties' opposing contentions focus on the roles of two further considerations. One is the provoking of the confrontation by the defender. The other is the defendant's failure to utilize a safe route for retreat from the confrontation. The essential inquiry, in final analysis, is whether and to what extent the rule of necessity may translate these considerations into additional factors in the equation. To these questions, in the context of the specific issues raised, we now proceed.

    IV

 The trial judge's charge authorized the jury, as it might be persuaded, to convict Peterson of second-degree murder or manslaughter, or to acquit by reason of self-defense. On the latter phase of the case, the judge instructed that with evidence of self-defense present, the Government bore the burden of proving beyond a reasonable doubt that Peterson did not act in self-defense; and that if the jury had a reasonable doubt as to whether Peterson acted in self-defense, the verdict must be not guilty. The judge further instructed that the circumstances under which Peterson acted, however, must have been such as to produce a reasonable belief that Keitt was then about to kill him or do him serious bodily harm, and that deadly force was necessary to repel him. In determining whether Peterson used excessive force in defending himself, the judge said, the jury could consider all of the circumstances under which he acted.

 These features of the charge met Peterson's approval, and we are not summoned to pass on them. There were, however, two other aspects of the charge to which Peterson objected, and which are now the subject of vigorous controversy. The first of Peterson's complaints centers upon an instruction that the right to use deadly force in self-defense is not ordinarily available to one who provokes a conflict or is the aggressor in it. Mere words, the judge explained, do not constitute provocation or aggression; and if Peterson precipitated the altercation but thereafter withdrew from it in good faith and so informed Keitt by words or acts, he was justified in using deadly force to save himself from imminent danger or death or grave bodily harm. And, the judge added, even if Keitt was the aggressor and Peterson was justified in defending himself, [p. 1231] he was not entitled to use any greater force than he had reasonable ground to believe and actually believed to be necessary for that purpose. Peterson contends that there was no evidence that he either caused or contributed to the conflict, and that the instructions on that topic could only misled the jury.

 It has long been accepted that one cannot support a claim of self-defense by a self-generated necessity to kill. [n. 48] The right of homicidal self-defense is granted only to those free from fault in the difficulty; it is denied to slayers who incite the fatal attack, encourage the fatal quarrel or otherwise promote the necessitous occasion for taking life.  The fact that the deceased struck the first blow, fired the first shot or made the first menacing gesture does not legalize the self-defense claim if in fact the claimant was the actual provoker.  In sum, one who is the aggressor in a conflict culminating in death cannot invoke the necessities of self-preservation. Only in the event that he communicates to his adversary his intent to withdraw and in good faith attempts to do so is he restored to his right of self-defense.

 This body of doctrine traces its origin to the fundamental principle that a killing in self-defense is excusable only as a matter of genuine necessity.  Quite obviously, a defensive killing is unnecessary if the occasion for it could have been averted, and the roots of that consideration run deep with us. A half-century ago, in Laney v. United States, this court declared

that, before a person can avail himself of the plea of self-defense against the charge of homicide, he must do everything in his power, consistent with his safety, to avoid the danger and avoid the necessity of taking life. If one has reason to believe that he will be attacked, in a manner which threatens him with bodily injury, he must avoid the attack if it is possible to do so, and the right of self-defense does not arise until he has done everything in his power to prevent its necessity.

 [p. 1232] In the case at bar, the trial judge's charge fully comported with these governing principles. The remaining question, then, is whether there was evidence to make them applicable to the case. A recapitulation of the proofs shows beyond peradventure that there was.

 It was not until Peterson fetched his pistol and returned to his back yard that his confrontation with Keitt took on a deadly cast. Prior to his trip into the house for the gun, there was, by the Government's evidence, no threat, no display of weapons, no combat. There was an exchange of verbal aspersions and a misdemeanor [n. 57] against Peterson's property [n. 58] was in progress but, at this juncture, nothing more. Even if Peterson's post-arrest version of the initial encounter were accepted-his claim that Keitt went for the lug wrench before he armed himself -the events which followed bore heavily on the question as to who the real aggressor was. [n. 60]
 

57. It is well settled that deadly force cannot be employed to arrest or prevent the escape of a misdemeanant. . . .
58. The law never tolerates the use of deadly force in the protection of one's property. . . .
60. Notwithstanding that the deceased provoked the original quarrel, the accused cannot, after that quarrel has ended or the deceased has withdrawn, invoke the right of self-defense in a subsequent difficulty which he himself causes or brings on. . . .

61. One may deliberately arm himself for purposes of self-defense against a pernicious assault which he has good reason to expect. . . . On the other hand, the true significance of the fact of arming can be determined only in the context of the surrounding circumstances. . . .

 The situation at bar is not unlike that presented in Laney.  There the accused, chased along the street by a mob threatening his life, managed to escape through an areaway between two houses. In the back yard of one of the houses, he checked a gun he was carrying and then returned to the areaway. The mob beset him again, and during an exchange of shots one of its members was killed by a bullet from the accused's gun. In affirming a conviction of manslaughter, the court reasoned:
 

It is clearly apparent . . . that, when defendant escaped from the mob into the back yard . . . he was in a place of comparative safety, from which, if he desired to go home, he could have gone by the back way, as he subsequently did. The mob had turned its attention to a house on the opposite side of the street. According to Laney's testimony, there was shooting going on in the street. His appearance on the street at that juncture could mean nothing but trouble for him. Hence, when he adjusted his gun and stepped out into the areaway, he had every reason to believe that his presence there would provoke trouble. We think his conduct in adjusting his revolver and going into the areaway was such as to deprive him of any right to invoke the plea of self-defense.

 Similarly, in Rowe v. United States, the accused was in the home of friends when an argument, to which the friends became participants, developed in the street in front. He left, went to his nearby apartment for a loaded pistol and returned. There was testimony that he then made an insulting comment, drew the pistol and fired a shot into the ground. In any event, when a group of five men began to move toward him, he began to shoot at them, killing two, and wounding a third. We observed that the accused "left an apparently safe haven to arm himself and return to the scene," and that "he inflamed the situation with his words to the men gathered there, even though he could have [p. 1234] returned silently to the safety of the [friends'] porch."  We held that
 

[t]hese facts could have led the jury to conclude that [the accused] returned to the scene to stir up further trouble, if not actually to kill anyone, and that his actions instigated the men into rushing him. Self-defense may not be claimed by one who deliberately places himself in a position where he has reason to believe "his presence . . . would provoke trouble."

 We noted the argument "that a defendant may claim self-defense if he arms himself in order to proceed upon his normal activities, even if he realizes that danger may await him"; we responded by pointing out "that the jury could have found that the course of action defendant here followed was for an unlawful purpose."  We accordingly affirmed his conviction of manslaughter over his objection that an acquittal should have been directed.

 We are brought much the readier to the same conclusion here. We think the evidence plainly presented an issue of fact as to whether Peterson's conduct was an invitation to and provocation of the encounter which ended in the fatal shot. We sustain the trial judge's action in remitting that issue for the jury's determination.

    V

 The second aspect of the trial judge's charge as to which Peterson asserts error concerned the undisputed fact that at no time did Peterson endeavor to retreat from Keitt's approach with the lug wrench. The judge instructed the jury that if Peterson had reasonable grounds to believe and did believe that he was in imminent danger of death or serious injury, and that deadly force was necessary to repel the danger, he was required neither to retreat nor to consider whether he could safely retreat. Rather, said the judge, Peterson was entitled to stand his ground and use such force as was reasonably necessary under the circumstances to save his life and his person from pernicious bodily harm. But, the judge continued, if Peterson could have safely retreated but did not do so, that failure was a circumstance which the jury might consider, together with all others, in determining whether he went further in repelling the danger, real or apparent, than he was justified in going.

 Peterson contends that this imputation of an obligation to retreat was error, even if he could safely have done so. He points out that at the time of the shooting he was standing in his own yard, and argues he was under no duty to move. We are persuaded to the conclusion that in the circumstances presented here, the trial judge did not err in giving the instruction challenged.

 Within the common law of self-defense there developed the rule of "retreat to the wall," which ordinarily forbade the use of deadly force by one to whom an avenue for safe retreat was open.  This doctrine was but an application of the requirement of strict necessity to excuse the taking of human life,  and was designed to insure the existence of that necessity. Even the innocent victim of a vicious assault had to elect a safe retreat [p. 1235] if available, rather than resort to defensive force which might kill or seriously injure.

 In a majority of American jurisdictions, contrarily to the common law rule, one may stand his ground and use deadly force whenever it seems reasonably necessary to save himself.  While the law of the District of Columbia on this point is not entirely clear, it seems allied with the strong minority adhering to the common law. In 1856, the District of Columbia Criminal Court ruled that a participant in an affray "must endeavor to retreat, . . . that is, he is obliged to retreat, if he can safely." [n. 80] The court added that "[a] man may, to be sure, decline a combat when there is no existing or apparent danger, but the retreat to which the law binds him is that which is the consequence."  In a much later era this court, adverting to necessity as the soul of homicidal self-defense, declared that "no necessity for killing an assailant can exist, so long as there is a safe way open to escape the conflict."  Moreover, the common law rule of strict necessity pervades the District concept of pernicious self-defense, and we cannot ignore the inherent inconsistency of an absolute no-retreat rule. . . .
 

80. United States v. Herbert, 26 Fed.Cas. 287, p. 289, No. 15,354a (D.C.Crim.Ct. 1856). There a waiter was slain by a guest during an altercation concerning the service.

 The trial judge's charge to the jury incorporated each of these limitations on the retreat rule. Peterson, however, invokes another--the so-called "castle" doctrine.  It is well settled that one who through no fault of his own is attacked in his home is under no duty to retreat therefrom. The oft-repeated expression that "a man's home is his castle" reflected the belief in olden days that there were few if any safer sanctuaries than the home.  The "castle" exception, moreover, has been extended by some courts to encompass the occupant's presence within the curtilage outside his dwelling.  Peterson reminds us that when he shot to halt [p. 1237] Keitt's advance, he was standing in his yard and so, he argues, he had no duty to endeavor to retreat.

 Despite the practically universal acceptance of the "castle" doctrine in American jurisdictions wherein the point has been raised, its status in the District of Columbia has never been squarely decided.  But whatever the fate of the doctrine in the District law of the future, it is clear that in absolute form it was inapplicable here. The right of self- defense, we have said, cannot be claimed by the aggressor in an affray so long as he retains that unmitigated role.  It logically follows that any rule of no-retreat which may protect an innocent victim of the affray would, like other incidents of a forfeited right of self-defense, be unavailable to the party who provokes or stimulates the conflict. Accordingly, the law is well settled that the "castle" doctrine can be invoked only by one who is without fault in bringing the conflict on.  That, we think, is the critical consideration here.

 We need not repeat our previous discussion of Peterson's contribution to the altercation which culminated in Keitt's death.  It suffices to point out that by no interpretation of the evidence could it be said that Peterson was blameless in the affair.  And while, of course, it was for the jury to assess the degree of fault, the evidence well nigh dictated the conclusion that it was substantial.

 The only reference in the trial judge's charge intimating an affirmative duty to retreat [n. 104] was the instruction that a failure to do so, when it could have been done safely, was a factor in the totality of the circumstances which the jury might consider in determining whether the force which he employed was excessive. [n. 105] We cannot believe that any jury was at all likely to view Peterson's [p. 1238] conduct as irreproachable. We conclude that for one who, like Peterson, was hardly entitled to fall back on the "castle" doctrine of no retreat, that instruction cannot be just cause for complaint.
 

104. The trial judge instructed the jury that Peterson was not required to retreat or to consider whether he could safely retreat if he reasonably and actually believed that deadly force was immediately necessary to avert an imminent peril of death or serious bodily harm. That was but another way of saying that the virtues of retreat may have to yield to the urgency of self-preservation. See text supra at notes 89-91. To the extent that this instruction might have been overly charitable to Peterson, he is obviously in no position to complain.
105. As Justice Holmes stated in Brown v. United States, supra note 42, 256 U.S. at 343, 41 S.Ct. at 502, "[r]ationally the failure to retreat is a circumstance to be considered with all the others in order to determine whether the defendant went farther than he was justified in doing . . . ."

 As we have stated, Peterson moved for a judgment of acquittal at trial, and in this court renews his contention that the evidence was insufficient to support a conviction of manslaughter.  His position is that the evidence, as a matter of law, established a right to use deadly force in self-defense. In considering that contention, we must accept the evidence "in the light most favorable to the Government, making full allowance for the right of the jury to draw justifiable inferences of fact from the evidence adduced at trial and to assess the credibility of the witnesses before it."  We have already concluded that the evidence generated factual issues as to the effect, upon Peterson's self-defense claim, of his aggressive conduct and his failure to retreat.  By the same token, the ultimate question of guilt or innocence of culpable homicide was one for the jury to decide. The jury resolved the question in favor of guilt, and we perceive no basis for disturbing its decision. Nor, in the circumstances here, is there a ground for impugning its verdict that the grade of Peterson's offense was manslaughter.

 The judgment of conviction appealed from is accordingly

 Affirmed.