noun, noun or participle which takes 'suru', transitive verb
Used for intense, sustained attacks in military, sports, or figurative contexts. Often appears with する as a transitive suru-verb.
敵軍が基地に猛攻を仕掛けた。
The enemy forces launched a fierce attack on the base.
後半
In the second half, the opposing team kept up an onslaught.