MacArthur became the Supreme Commander Southwest Pacific Area (SWPA) on 18 April 1942, although he preferred to use the more conventional title of Commander in Chief. MacArthur's first General Order created five subordinate commands: Allied Land Forces, Allied Air Forces, Allied Naval Forces, United States Army Forces in Australia (USAFIA), and the United States Army Forces in the Philippines. The last command had a short life. Lieutenant General Jonathan Wainwright's United States Army Forces in the Philippines disintegrated over the following three weeks, and disappeared entirely when Wainwright surrendered on Corregidor on 6 May.