Many of us know about the Native American Code Talkers of World War II, but it was news to me that they also operated in World War I.
This new short video describes their pioneering work. I’m adding it to The Best Resources For Learning About World War I.
There are also sources to learn both ESL and WWI like this page:
http://www.subtitleclick.com/watch/rawvideos/who_started_world_war_i_crash_course_world_history_210_1456.aspx