Army spokesman Colonel Tom Collins said Gen McChrystal notified the service of his plans, but he has not yet submitted formal retirement papers. It is not clear when he would leave the service, but the process usually takes a few months.
US president Barack Obama has praised Gen McChrystal's long Army career but said his intemperate remarks in a magazine article that appeared last week were too much.
Gen McChrystal apologized for the remarks in Rolling Stone magazine and flew to Washington last week to resign as commanding general of the war.
COMMENT RULES: Comments that are judged to be defamatory, abusive or in bad taste are not acceptable and contributors who consistently fall below certain criteria will be permanently blacklisted. The moderator will not enter into debate with individual contributors and the moderator’s decision is final. It is Belfast Telegraph policy to close comments on court cases, tribunals and active legal investigations. We may also close comments on articles which are being targeted for abuse. Problems with commenting? firstname.lastname@example.org