What reasons are given for why the us is fighting?

Soldiers do many things, from shooting enemies, to digging defensive trenches. They are used to defend their country, or attack another country's army. It is difficult, and soldiers must be in good shape, both physically and mentally.

Explanation:

this means that germany had to pay the allied countries. reparations are/is essentially payment for something that they have done wrong, so after ww1, germany was forced to pay reparations so they could replenish the allied countries resources' that they had lost during the war.