In addition to cardiac muscle tissue, the heart wall also contains a dense connective tissue network forming the fibrous skeleton of the heart that reinforces the myocardium internally and anchors the cardiac muscle fibers. This network of collagen and elastin fibres is thicker in some areas than others.
Inactivated in 1946, III Corps was reactivated in 1951 and served on active duty until 1959. Inactivated that year, it quickly returned to duty at Fort Hood during the Berlin Crisis in 1961. In 1962. III Corps was designated as part of the U.S. Army Strategic Army Corps. During the Vietnam conflict, III Corps trained and deployed two field force headquarters and many. combat and combat service support units totaling more than 100,000 Soldiers.
FORSCOM picked four brigades from four different corners of the Army to test it out: 1st Stryker Brigade Combat Team, 2nd Infantry Division at Joint Base Lewis-McChord, Washington; 3rd Brigade, 1st Armored Division at Fort Bliss, Texas; 1st Brigade Combat Team, 10th Mountain Division at Fort Drum, New York; and the 20th Engineer Brigade, which has units at Fort Stewart, Georgia, Fort Knox, Kentucky, and Fort Bragg, North Carolina.