Souyoku ~Zero Fighter and Hayabusa~ (Nichibun Comics)

The brothers looked up at the same sky, but fought on different seas and lands. The older brother, Jiro, served in the Navy. The younger brother, Saburo, served in the Army. Both fighter pilots, the twin brothers switch places for fun, and amid the thunder of military boots thunder, a strange fate awaits them in wartime!

The Pacific War, depicted by the master of war manga, Takizawa Seiho.