Check out this interesting site:
http://www.redcross.org/museum/exhibits/knits.asp
Great link! Also, if you go to this one http://www.hjsstudio.com/tutorials.html and then scroll down near the bottom of the page, there are WWI and WWII patterns, as well.
Great site, thanks so much for posting it!
Wow! Imagining how many young women sat at home sat knitting each night worrying about their sweethearts brought a tear to my eye. Thank you for the wonderful link.