 On 15 April, Lieutenant General Slim gave orders for the oil fields and refinery to be demolished.The situation became so critical that General Harold Alexander, commanding the Burma Army, asked Lieutenant General Joseph Stilwell, the American commander of the China Burma India Theater and Chief of Staff to Chiang Kai-shek, to move the Chinese 38th Division immediately into the Yenaungyaung area.On 16 April, almost 7,000 British soldiers, and 500 prisoners and civilians were encircled by an equal number of Japanese soldiers from the IJA 33rd Division at Yenangyaung and its oil field.