The head of the Soviet armed forces, who has opposed unilateral cuts in Red Army conventional forces, resigned the same day President Mikhail S. Gorbachev announced a major cutback of 500,000 troops. Foreign Ministry spokesman Gennady Gerasimov confirmed Wednesday's resignation of Sergei Akhromeyev, 65, but said the marshal's decision was based on poor health and not in protest of Gorbachev's move. "He supported the proposals in the speech" Gorbachev gave at the United Nations, Gerasimov said.