If you're talking about the American Civil War - None, they weren't invented yet
NO
There were no helicopters in WW1
no
About 500. Half recovered
The were many people in the civil war.
No. Not in WW2. There were no operational helicopters until really after the War.
Over 5,000 US helicopters were destroyed in 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
apather