PLEASE! NEED HELP ASAP! Name two innovations or inventions that came about during World War II. Explain why such innovations occur during a time of war.

The Jerrycan, jerrycan was developed secretly in pre-war Germany. Its purpose was to serve as a mobile fuel container for the military.
Radio and landing navigation, At the beginning of WWII, there were next to zero means to navigate the airplanes from the ground control. That meant that once airborne, pilots were basically on their own. Targets were widely missed and unsafe night landings resulted in damage to valuable wartime assets. The Brits moved to change that.
(highly suggest rewording due to plagiarism)

Aor b but i'm going with b

He droped it over the bridge into the river