the united states army forces in the corridor were originally under the iran-iraq service command - later renamed the persian gulf service command (pgsc). this was the successor to the original united states military iranian mission, which had been put in place to deliver lend-lease supplies before the united states had entered the world war. the mission was originally commanded by colonel don g. shingler, who was then replaced late in 1942 by brigadier general donald h. connolly. both the iran-iraq service command and the pgsc were subordinate to the u.s. army forces in the middle east (usafime). pgsc was eventually renamed simply the persian gulf command.