Answer:
the use of poison gas and machine guns
Explanation:
Aerial attacks weren't really a thing, unrestricted submarine warfare was a reason why the US joined the war but not a factor in high casualty rates, and blimps using direct artillery fire isnt as practical as machine guns and poison gas
Answer: General George Washington's army crossed the icy Delaware on Christmas Day 1776 and, over the course of the next 10 days, won two crucial battles of the American Revolution. In the Battle of Trenton (December 26), Washington defeated a formidable garrison of Hessian mercenaries before withdrawing.
Hope this helps..... Stay safe and have a Merry Christmas!!!!!! :D