About 4,000 of the 11,000 American and Filipino prisoners of war from Corregidor were marched through the streets of Manila to incarceration at Fort Santiago and Bilibid Prison, criminal detention centers turned POW camps. US Army and Navy nurses (the "Angels of Bataan and Corregidor") continued to work on Corregidor for several weeks, and were then sent to Santo Tomas. The rest were sent off in trains to various Japanese prison camps. General Wainwright was incarcerated in Manchuria. Over the course of the war, thousands were shipped to the Japanese home islands as slave labor. Some were eventually freed at the Raid at Cabanatuan and during the battle for Manila's liberation. While most of the Allied forces on Corregidor surrendered, many individuals continued fighting as guerrillas.