World War I & World War II

http://www.bbc.co.uk/history/worldwars/wwone/ - BBC site WWI

http://en.wikipedia.org/wiki/Trench_warfare - Wikipedia - Good infromation cannot use for citing evidence

http://www.firstworldwar.com/features/trenchlife.htm - Good Site - WWI


http://www.britannica.com/EBchecked/topic/604210/trench-warfare - Encyclopedia Britannica - WWI