Here are two recent posts on other sites about Native Americans in the First World War.

Soldiers Unknown is a historical novel by Chag Lowry which deals with the voluntary service of tribal members from Northern California. You can read about it here.

You can read here about Pvt. Thadius Sittingdown,  Co. G, 2nd Bn., 358th Regt., 90th “Wild West” Div., who was a member of the Cherokee Nation.

James (“Jim”) Patton BS BA MPA is a retired state official living in Shawnee, Kansas and a frequent contributor to several WW1 e-publications, including "Roads to the Great War," "St. Mihiel Tripwire," "Over the Top" and "Medicine in the First World War." He has spent many hours walking the WW1 battlefields, and is also an authority on British regiments and a collector of their badges. An Army Engineer during the Vietnam War, he does work for the US World War 1 Centennial Commission and has memberships in the WW1 Historical Association, the Western Front Association, the Indian Military Historical Society and the Salonika Campaign Society.