What were the greatest fashion trends of 1900-1999?

[smallgibby]

I want to design a couple of dresses, and I tried looking up the greatest trends of the years listed below, but there's too much to choose from. Can someone tell me the most popular trends (both couture and casual) for:
*1900's
*1920's
*1930's
*1940's
*1950's
*1960's
*1970's
*1980's
*1990's
Please assist me?

 

[Katniss]

This is a great website for you to check out, the museum is near where I live and is fantastic.. if you go on to the website and click past displays you'll get some info on decades!