Answer: trench warfare
Explanation: The type of warfare that was used in World War 1 was trench warfare. Basically, you can go under a high area and start shooting at the opponent. This was trench warfare, basically levels of fighters. Hope this helps!
Answer:
Climate is the long-term weather pattern of a particular place over a long period of time
Explanation:
They were a strength to the Union. They carried soldiers and supplies to the battlefront much quicker, from a few months' march to a week. Having the supplies quicker to the battleground gave the Union the advantage over the Confederates, since the Union could recover much faster from any loss.
It was a faster way for the U.S. to get to certain places.