I believe it was the use of poisonous gasses, which they not only used on the Jews but in war too......., or The newly created Machine gun<span />
Geographic means physicals features of the land in this case you look at only the negatives of this like big bodies of water mountains and steep terrain these made it difficult because some settlers didn't have horses or were traveling in large groups wich could contain elderly and young children
The answer is A. They lost 55%
I think it the Boston tea party. But if iam wrong Iam so sorry look it up on google that may help
It made steel more cost effective
