Military service Kalergis enlisted in the
United States Army in February 1941, prior to the entrance of the United States into World War II. He was commissioned as a lieutenant after attending the Field Artillery Officer Candidate School at
Fort Sill, Oklahoma in 1942. He served as an artillery officer with the 882nd Field Artillery Battalion. By November 1943, he was a captain and battalion adjutant and promoted to major shortly after the unit arrived in France in February 1945. He was awarded the
Bronze Star Medal while with the 882nd, which generally supported the 70th Infantry Division's 274th Infantry Regiment during the Rhineland and Central Europe campaigns. From 1949 to 1952, Kalergis, as a major, was an assistant professor of military science and tactics at
Saint Bonaventure College, a Franciscan school in
St. Bonaventure, New York. As a lieutenant colonel in 1954, Kalergis commanded the 36th Field Artillery Group's 597th Armored Field Artillery Battalion in Hanau, Germany. In the 1960s, Kalergis served tours in South Korea and as commander of the
2nd Armored Division at
Fort Hood, Texas. During the Vietnam War from 1967 to 1968, he commanded the artillery for the corps-level organization
I Field Force, Vietnam. The next year, he served as First Field Force's chief of staff. As a major general, Kalergis was Deputy Commanding General for Logistical Support of the
United States Army Materiel Command from 1970 to 1972. In early 1972, Kalergis was recognized for his organizational abilities and tasked with drawing up the 1973 reorganization of the United States Army, the most extensive reorganization of the army in the continental United States since 1942. Operation Steadfast resulted in the establishment of
United States Army Forces Command (FORSCOM) and
United States Army Training and Doctrine Command (TRADOC). It was followed by subsequent reorganizations in Army Staff Headquarters and of units in the field. The effort to accomplish internal reorganization was initiated with the Army, forestalling efforts by the executive or legislative branch in the post-Vietnam era. Kalergis then served as assistant vice chief for Army Chief of Staff. In 1974 Kalergis succeeded
Glenn D. Walker as commanding general of the
First United States Army at
Fort Meade, Maryland. He served in this post until his 1975 retirement.
Post-military service After retiring from the military, in 1976 Kalerigis chaired a task force that drafted an action plan
Tank Weapon System Management. A Program for Maximum Effectiveness to improve armored forces management. He served as a Pentagon consultant from 1979 to 1982. He was also chairman of Vinnell Corporation which trained the Saudi National Guard. == Personal life ==