The defenders of Bataan, however, were blockaded and isolated by the surrounding Japanese air and naval forces. Malnutrition and disease weakened the troops and, when they realized no Allied help was coming from Pearl Harbor or Australia, their morale plummeted as well. Meanwhile, Japanese reinforcements strengthened Homma's forces, and he launched a second offensive on 3 April. This attack, coming three weeks after MacArthur left for Australia, broke through the defensive lines and defeated an American counter-attack. On 9 April, in order to prevent unnecessary slaughter, the remaining 78,000 defenders surrendered. They were forced to march more than 60 miles (some 100 km) from Bataan to Capas, Tarlac, in what became known as the Bataan Death March. About 2,000 men escaped from Bataan to the fortified island of Corregidor, where they held out against the Japanese air and artillery bombardment until themselves surrendering on 6 May
Photo - Fall of Bataan historical marker - Photo by CC BY-SA 3.0 Eugene Alvin Villar (seav) via Wikimedia Commons
Map - Situation map, January - April 1942, of Bataan Peninsula on the Luzon Island, Republic of the Philippines - Corregidor.org