During World War I Leach commanded the 151st Field Artillery Regiment, 42nd Infantry Division, and took part in the battles at Champagne-Marne, Aisne-Marne, St. Mihiel, and Meuse-Argonne.
He took part in battles at Champagne-Marne, Aisne-Marne, St. Mihiel, and Meuse-Argonne. During World War I, Leach commanded the 151st Field Artillery Regiment and 42nd Infantry Division.
During World War I, Leach commanded the 151st Field Artillery Regiment and 42nd Infantry Division. He took part in battles at Champagne-Marne, Aisne-Marne, St. Mihiel, and Meuse-Argonne.
During World War I, Leach commanded the 151st Field Artillery Regiment and 42nd Infantry Division. He took part in battles at Champagne-Marne, Aisne-Marne, St. Mihiel, and Meuse-Argonne.