The United States chemical mortar battalions were army units attached to U.S. infantry divisions during World War II. They were armed with 4.2-inch (107 mm) chemical mortars. For this reason they were also called the "Four-deucers".
The United States chemical mortar battalions were army units attached to U.S. infantry divisions during World War II. They were armed with 4.2-inch (107 mm) chemical mortars. For this reason they were also called the "Four-deucers". (en)
The United States chemical mortar battalions were army units attached to U.S. infantry divisions during World War II. They were armed with 4.2-inch (107 mm) chemical mortars. For this reason they were also called the "Four-deucers". (en)