Premise: The 89th Medium Tank Battalion was an armored tank unit of the United States Army. It was activated in Korea in August, 1950 and in November 1951, it was assigned to the 25th Infantry Division. The unit participated no fewer than ten campaigns, from 1951 through the Armistice in 1953 with the 26th Division. It earned the Presidential Unit Citation and the Navy Unit Commendation.
Hypothesis: The 89th Medium Tank Battalion was used before 1950