Most significant/iconic event of each decade?

[VAMatt]

The_Liquid_Laser said:

HomokHarcos said:

1900s - Boxer Rebellion
1910s - Assassination of Franz Ferdinand
1920s - Stock market crash
1930s - German invasion of Poland
1940s - Atomic bombings of Hiroshima and Nagasaki
1950s - Suez Canal Crisis
1960s - Moon landing
1970s - Soviet invasion of Afghanistan
1980s - Tianamen Square protests
1990s - Collapse of the Soviet Union
2000s - 9/11 attacks
2010s - Brexit

My list would look like this
1900s - First Airplane
1910s - Assassination of Franz Ferdinand
1920s - Stock market crash
1930s - German invasion of Poland
1940s - Atomic bombings of Hiroshima and Nagasaki
1950s - Sputnik
1960s - Birth control pill first sold
1970s - First home computer
1980s - Berlin wall comes down
1990s - Internet available commercially
2000s - 9/11 attacks
2010s - too early to tell

I was trying to put a list together myself, but realized it needs real time and consideration.  I just don't have that this morning.  So, I'm gonna piggyback on yours, as it looks pretty good.