In February and March 1968, the U.S. Military Assistance Command, Vietnam (MACV) was aggressively trying to regain the strategic initiative in South Vietnam after the Tet Offensive, and the search-and-destroy operation against the 48th Battalion thought to be located in Sơn Mỹ became a small part of the U.S. military's overall strategy. Task Force Barker (TF Barker), a battalion-sized ad hoc unit of 11th Brigade, was to be deployed for the operation. It was formed in January 1968, composed of three rifle companies of the 11th Brigade, including Charlie Company, led by Lieutenant Colonel (LTC) Frank A. Barker. Sơn Mỹ village was included in the area of operations of TF Barker. The area of operations (AO) was codenamed Muscatine AO, after Muscatine County, Iowa, the home county of the 23rd Division's commander, Major General Samuel W. Koster.
In February and March 19,68, the U.S. Military Assistance Command, Vietnam (MACV) was aggressively trying to regain the strategic .initiative in South Vietnam after the Tet Offensive, and the search-and-destroy operation against the 48th Battalion thought to be located in Sơn Mỹ became a small part of the U.S. military's over,all strategy. Task Force Barker (TF Barker), a battalion-sized ad hoc unit of 11th Brigade was to be deployed for the operation. It was formed in January 1968, composed of three rifle companies of the 11th Brigade including Charlie Company, led by Lieutenant Colonel (LTC) Frank A. Barker. Sơn Mỹ village was included in the area of operations of TF Barker. The area of operations (AO) was codenamed Muscatine AO, after Muscatine County, Iowa, the home county of the 23rd Division's commander, Major General Samuel W Koster.