http://www.historyworld.net/

http://www.hyperhistory.com/

http://www.fsmitha.com/

http://www.hyperhistory.com/online_n2/History_n2/a.html

http://www.infoplease.com/ipa/A0001196.html

http://en.wikipedia.org/wiki/World_History

http://www.history-world.org/index.html

http://www.history.com/topics/worldhistory

http://worldhistory.pppst.com/index.html

http://www.factmonster.com/ipka/A0001196.html