Complex sentence: Strongheart's public performances began in 1917 with a job at the YMCA War Work Council, touring military camps across New England, where he gave presentations on Native American culture and spoke seriously about military service.
Split into simpler sentences: Strongheart's public performances began in 1917 when he worked for the YMCA War Work Council. He toured military camps across New England, where he gave presentations on Native American culture and spoke seriously about military service.