If you mean World War II, the answer is Germany, it was divided by the Berlin Wall.
The planes carried bombs that exploded when the pilots crashed into targets.
Explanation:
They were part of Japanese Special Attacks Units from the military aviators. The attacks consisted of missions against Allied naval vessels to destroy more effectively the warships than with conventional air attacks. In order to achieve this, the pilots converted their planes into a flying bomb and crashed themselves into the ships.
I hope this answer helps you.