a bloody war.
No there was not a war going on during Tycho Brahe's lifetime.
No, the chemical was unknown.
Mainly during WW2 and they came to service in the Korean War in 1950-1953.
Civil War 1861-1865
World War 2
going shopping
yes
Nothing, that discovery was made after the war began.
the african americans were still in slavery during the civil war
World War 2, Vietnam War
No war at all. he was the president during the Great depression.
Vietnam of course!