A the civil war is the answer
Explanation: On the Western Front, the war was fought by soldiers in trenches. Trenches were long, narrow ditches dug into the ground where soldiers lived. They were very muddy, uncomfortable and the toilets overflowed. These conditions caused some soldiers to develop medical problems such as trench foot.
Soldiers in the First World War did not spend the whole of the time in the trenches. The British Army worked on a 16 day timetable. Each soldier usually spent eight days in the front line and four days in the reserve trench. Another four days were spent in a rest camp that was built a few miles away from the fighting.
During this time in the United States, it was possible to elect both a president and vice president from different political parties, since the person with the second-greatest number of electoral votes automatically became the vice president.
Answer:
Agriculture is the answer