兵営 is read as へいえい (heiei) and means barracks.
へいえい
heiei
へいえき
military service
へいほう
art of war
へいりょく
military force
へい
(common) soldier
へいいん
military strength
へいがく
military science
へいだん
army corps
へいほうか
tactician
へいちょう
leading private (Imperial Japanese Army)
へいじ
military affairs
ひょうごけんりつだいがく
University of Hyogo
へいぶ
Ministry of War (Tang dynasty China)