All were part of U. S. war efforts in Vietnam, except ? ( NEED ASAP !)

1 ) Use Of Agent Orange

2 ) Use Of Attack Helicopters

3 ) Use Of Nuclear Weapons

4 ) Use Of Napalm

3) Use of Nuclear Weapons

Explanation:

Although the U.S didn't use nuclear weapons they got very close to using it.

The U.S did use the other tactics though. They were very effective.

explanation:

boi that sentence trash

explanation:

japan participated in world war i from 1914 to 1918 in an alliance with entente powers and played an important role in securing the sea lanes in the west pacific and indian oceans against the imperial german navy as the member of the allies.