As chief commander of the elite Quds force, the overseas arm of Iran's Revolutionary Guard Corps (IRGC), Soleimani ran clandestine operations abroad and was a key figure in Iran's longstanding campaign to drive U.S. forces from the Middle East. Tensions between Iran and Israel, along with its ally the United States, have reached a new high over Israel's war on Iran-backed Hamas militants in Gaza in retaliation for their Oct. 7 rampage through southern Israel. Yemen's Iran-backed Houthi militia have attacked ships they say have links to Israel in the entrance to the Red Sea, one of the world's busiest shipping lanes. U.S. forces have come under attack from Iran-backed militants in Iraq and Syria over Washington's backing of Israel and have carried out their own retaliatory airstrikes.