Another command, established under emergency conditions when a convoy intended for supply of the Philippines, known as the Pensacola Convoy, was rerouted to Brisbane due to the attack on Pearl Harbor. Brigadier General Julian F. Barnes was ordered to assume command of all troops in the convoy on 12 December 1941 concurrent with their designation as Task Force—South Pacific, and place himself under the command of MacArthur. The next day, by radiogram, the Chief of Staff of the United States Army, General George C. Marshall, ordered Barnes to assume command as Commander, US Troops in Australia and take charge of all troops and supplies. On 22 December 1941, with the convoy's arrival in Brisbane, the command was designated as United States Forces in Australia (USFIA). It was renamed U.S. Army Forces in Australia (USAFIA) on 5 January 1942. Its mission was to create a base in Australia for the support of the forces still in the Philippines.