no
There were no helicopters in WW1
No. Not in WW2. There were no operational helicopters until really after the War.
Helicopters were not used in World War 1. And they were just being designed in World War 2. It wasn't until the Korean War that the Helo was used.
The Korean war was the first time Vertical Envelopment was used, or the use of helicopters to assist troops in battle.
That was the Vietnam war
In the Korean war
NO
No!
Vertical Envelopment, or the use of helicopters in combat, was first introduced in the Korean war.
Jets were introduced by the Nazi's towards the end of WWII. Helicopters debuted for the Americans in Korea. Admitting that the question itself is requesting a subjective answer, I'm tempted to say the first war to see extensive use of both jets and helicopters was Viet Nam, but that was only a conflict, so I guess the first American war to see extensive use of both jets and helicopters was Gulf War I, and the first war in the world to see extensive use of both jets and helicopters was probably the Falklands War.
Yes, helicopters were used in WW1. Don't be silly, helicopters were invented towards the end of WWII.