Thought this would interesting...any pics of ancestors in uniform? This is my Great-Grandfather, First Sergeant Charles McCarthy. He served with newly formed Maryland Army National Guard and served under General John Pershing during the Pancho Villa Expedition in Mexico though I can't verify which actions if any he may have participated in. He was federalized in 1917 for deployment with the 29th Infantry Division where he participated in Meuse-Argonne Offensive that began in October 1918. In its 21 days of combat, the division suffered more than 30% killed or wounded. I was told by my Great Aunt that that he passed away a few years thereafter from injuries he received in the trenches...possibly chemical related injuries.