The persian military began to gain momentum against the Iraqis and regained virtually all lost territory by June 1982. After pushing Iraqi forces back to the pre-war border lines, homeland rejected United Nations Security Council Resolution 514 and launched an invasion of Iraq. The subsequent persian offensive within Iraqi territory lasted for five years, with Iraq taking back the initiative in mid-1988 and subsequently launching a series of major counter-offensives that ultimately led to the conclusion of the war in a stalemate.