![Soldiers assigned to 1st Battalion, 3rd U.S. Infantry Regiment, "The Old Guard" calibrates an M252 81mm mortar system for accuracy during a live-fire training exercise in support 1st Attack Reconnaissance Battalion, 82nd Soldiers assigned to 1st Battalion, 3rd U.S. Infantry Regiment, "The Old Guard" calibrates an M252 81mm mortar system for accuracy during a live-fire training exercise in support 1st Attack Reconnaissance Battalion, 82nd](https://c8.alamy.com/comp/MPHCC4/soldiers-assigned-to-1st-battalion-3rd-us-infantry-regiment-the-old-guard-calibrates-an-m252-81mm-mortar-system-for-accuracy-during-a-live-fire-training-exercise-in-support-1st-attack-reconnaissance-battalion-82nd-combat-aviation-brigade-at-fort-ap-hill-va-march-13-us-army-photo-by-sgt-steven-galimore-MPHCC4.jpg)
Soldiers assigned to 1st Battalion, 3rd U.S. Infantry Regiment, "The Old Guard" calibrates an M252 81mm mortar system for accuracy during a live-fire training exercise in support 1st Attack Reconnaissance Battalion, 82nd
![Unit History of the 81st Chemical Mortar Battalion in World War II: Cross, Walt: 9780985099688: Amazon.com: Books Unit History of the 81st Chemical Mortar Battalion in World War II: Cross, Walt: 9780985099688: Amazon.com: Books](https://m.media-amazon.com/images/I/71BSjts6-iL._AC_UF1000,1000_QL80_.jpg)
Unit History of the 81st Chemical Mortar Battalion in World War II: Cross, Walt: 9780985099688: Amazon.com: Books
![DVIDS - Images - Force Multiplier | U.S. Marines with 1st Battalion, 24th Marine Regiment conduct mortar drills with an M252A1 81mm mortar at Mountain Warfare Training Center [Image 8 of 9] DVIDS - Images - Force Multiplier | U.S. Marines with 1st Battalion, 24th Marine Regiment conduct mortar drills with an M252A1 81mm mortar at Mountain Warfare Training Center [Image 8 of 9]](https://d1ldvf68ux039x.cloudfront.net/thumbs/photos/2207/7339403/1000w_q95.jpg)
DVIDS - Images - Force Multiplier | U.S. Marines with 1st Battalion, 24th Marine Regiment conduct mortar drills with an M252A1 81mm mortar at Mountain Warfare Training Center [Image 8 of 9]
![File:U.S. soldiers of the 3rd Chemical Mortar Battalion near Bitburg, Germany, 3 March 1945 (148727340).jpg - Wikimedia Commons File:U.S. soldiers of the 3rd Chemical Mortar Battalion near Bitburg, Germany, 3 March 1945 (148727340).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/3/3f/U.S._soldiers_of_the_3rd_Chemical_Mortar_Battalion_near_Bitburg%2C_Germany%2C_3_March_1945_%28148727340%29.jpg)
File:U.S. soldiers of the 3rd Chemical Mortar Battalion near Bitburg, Germany, 3 March 1945 (148727340).jpg - Wikimedia Commons
![Unit History of the 81st Chemical Mortar Battalion in World War II | Walt Cross Book | In-Stock - Buy Now | at Mighty Ape NZ Unit History of the 81st Chemical Mortar Battalion in World War II | Walt Cross Book | In-Stock - Buy Now | at Mighty Ape NZ](https://d3fa68hw0m2vcc.cloudfront.net/721/154141551.jpeg)