What year was the worst recession in American history?

Question

Ignore this year since we're still living, so pre-2007.

Answer 1

End of 1989 were the events that started it, 1989 was when the recession began, it lasted until the 'early' 1990's. It was a burst bubble, and industrial/manufacturing sales decrease cause.

Answer 2

The great depression that began in 1929 and lasted until the US entered WWII.

Answer 3

the great depression starting 1929 everything crashed