Wikipedia: History of Colombia - Ranges from the pre-Colombian period to recent developments. - http://en.wikipedia.org/wiki/History_of_Colombia
The History of the Republic of Colombia - Individual articles on Colombian history and issues organized by theme. - http://www.hartford-hwp.com/archives/42/index-d.html
Historical Text Archive - Colombia - Collection of texts relating to history, politics and famous people. - http://historicaltextarchive.com/sections.php?op=listarticles&secid=44