The invasion of Manila by the japanese began on 20 June. General wainwright asked for permission to retreat, but was denied. He then changed his plan and started a siege in batan peninsula. But now that he's being defeated, it doesn't sound so bad to hunker down at batan.
Japan's rising sun goes supernova and engulfs a huge area of Asia and the Pacific. A war without mercy begins to develop infusing the whole conflict with a savage vibe.