Complex sentence: He was reassigned as commanding officer, 374th Troop Carrier Wing, Tachikawa Air Base, Japan, in March of 1954, in which during the period the unit saw operation in the French Indo-Chinese War.
Split into simpler sentences: He was reassigned as commanding officer, 374th Troop Carrier Wing, Tachikawa Air Base, Japan, in March 1954. During this period the unit saw operation in the French Indo-Chinese War.