They DO NOT test without prior written consent and your signature. It's the law. They can't just do it without you knowing that they specifically tested for THAT particualar disease.
if you mean an event 1857-present then here are some good ones
Entering World War I
Civil Rights Movement
Joining the League of Nation(in the end we did not join)
the New Deal
Dropping of the Atomic Bomb
Cold War
Korean War
Vietnam War
Watergate Scandal
The Red Scare
Invasion of Cuba(forgot the...
if you mean an event 1857-present then here are some good ones
Entering World War I
Civil Rights Movement
Joining the League of Nation(in the end we did not join)
the New Deal
Dropping of the Atomic Bomb
Cold War
Korean War
Vietnam War
Watergate Scandal
The Red Scare
Invasion of Cuba(forgot the...