Prior to 1951, what major even happened that contributed to the spike in the national debt? I NEED THIS ASAP!!!

Who paid for wWII?

Hmmm....I don't think it was us

^ the US

So did the cost of the war increase the national debt?

I don't know. That's my problem.

http://www.ritholtz.com/blog/wp-content/uploads/2010/05/National-Debt-GDP-L.gif

See the spike 1940-1945? So what happened then.

1939- 1945 was WW2... so yes, it probably was WW2. Do you know of any other events?