What was the impact of gas on ww1 and which battles was it used in

Gas was a very dangerous and effective weapon for both the allies and axis forces during WW1. the most famous battle that saw the use of gas would be The Battle of The Somme

Explanation:

The Germans introduced the weapon claiming it would shorten the war. they used 150 tons of lethal chlorine gas against two French colonial divisions at Ypres, Belgium. (Battle of Second Ypres)

if i am correct the answer is going to be a) the federal program of reconstruction ended.

how is this a question? but yes, they were. if i recall correctly, it was very handy for native americans to use buffalo skin.