noun, noun or participle which takes 'suru', transitive verb
assistance; support; reinforcement
Formal term for coming to help, often used in military, disaster relief, or organizational contexts. Implies arrival of aid or reinforcements.
被災地に自衛隊が来援した。
The Self-Defense Forces came to assist the disaster area.
同盟国からの来援を要請する。
We request reinforcements from our allied nations.