The best way to stop a war? Send in...
Rip Regan has a "power suit" given to him by a friendly scientist [NOTE TO SCIENTISTS: If you want to be more popular, give people power suits!!]. Said suit makes him invulnerable, super-strong, able to leap tall buildings, etc.
Anyway, in the darkest days of 1940, the world is going to hell:
His plane is shot down, but that's no deterrent!
Next, Rip Regan solves poverty and global warming!! You go, Power Man!!
From Fight Comics #10 (1940)