What did Eddie learn about the fire in the Philippines?

Eddie learned that Captain Morton started the fire.

The oil barrels were pitched at the first rise of the hill. Less than 100 yards away was the entrance to the coal mine. There was a supply hut nearby and Morton made sure it was empty, then ran inside; he emerged with an armful of grenades, rifles, and two primitive-looking flamethrowers. "Let's burn it down," he said.