With the start of the
Pacific War, Homma was named commander of the 43,110-man
IJA 14th Army and tasked with the
invasion of the Philippines. He ordered his troops to treat the Filipinos not as enemies but as friends, and respect their customs and religion. In one instance, on his approach to Manila, Homma stopped his columns and ordered the men to clean up and tighten formations, believing that unkempt soldiers are more likely to loot and rape. His approach towards Filipino civilians earned him the enmity of his superior, General Count
Hisaichi Terauchi, commander of the
Southern Army, who sent adverse reports about Homma to Tokyo from his headquarters in
Saigon. Also, subversion was growing within Homma's command by a small group of insubordinates, under the influence of Colonel
Masanobu Tsuji. In Homma's name, they sent out secret orders against his policies, including ordering the execution of Filipino Chief Justice
José Abad Santos and attempted execution of former Speaker of the House of Representatives
Manuel Roxas, which Homma found out about in time to stop. Homma failed to give credence to the possibility that a retreat into the
Bataan Peninsula by Filipino-American forces might succeed in upsetting the Japanese timetable. By the time he recognized his mistake, his best infantry division had been replaced by a poorly trained reserve brigade, greatly weakening his assault force. Rather than waste his men in furious frontal assaults, he tried to outmaneuver the American forces. This brought criticism from superiors, who believed he had been "contaminated" by Western ideas about conserving the lives of his men. negotiates the surrender of American forces in Bataan with Homma, 6 May 1942 Worried about the stalled offensive in
Luzon,
Hirohito pressed
Army Chief of Staff Hajime Sugiyama twice in January 1942 to increase troop strength and launch a quick knockout on Bataan. Following these orders, Sugiyama put pressure on Homma to renew his attacks. The resulting
Battle of Bataan, commencing in January 1942, was one of the most intense in the campaign. Following Japanese victory in April, at least 60,000 Allied prisoners of war were marched 60 miles (100 km) to a prisoner-of-war camp. Due to ill treatment and abuse from Japanese soldiers, at least 5,500 Allied soldiers
died during the march. Homma became known as the Beast of Bataan among Allied soldiers. Despite Japanese victory in the Battle of Bataan, the deteriorating relationship between Homma and Sugiyama led to the removal of Homma from command shortly after the
fall of Corregidor, and he was thereafter commander of the 14th Army in name only. The
New York Times erroneously reported prior to the fall of Bataan that Homma was replaced by
General Yamashita, and that Homma had committed suicide. The
Imperial General Headquarters regarded Homma as not aggressive enough in war (resulting in the high cost and long delay in securing the American and Filipino forces' surrender), and too lenient with the Filipino people in peace, and he was subsequently forced into retirement in August 1943. Homma retired from the military and lived in semiseclusion in Japan until the end of the war. ==War crimes trial and execution==