D day is the answer it was when we effort to liberate mainland Europe from the nazis
<span />
<span>obeying national leaders without question</span>
Thomas Jefferson was hesitant to buy the Louisiana territory because it was against the constitution and because it cost lots of money.
Answer:
Trench warfare was important during The First World War. ... Trenches were used to protect solders from machine guns from the opposing side.
Scientists and inventors on both sides worked throughout the war to improve weapon technology in order to give their side an edge in the fight.
