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to start; to begin; to commence
to challenge; to pick (a fight); to make (war); to draw (a reaction) from
to set (traps); to plant (explosives); to lay (mines)
to make a meld call
敵は夜明け前に奇襲を仕掛けてくる可能性が高い。
There is a high possibility the enemy will launch a surprise attack before dawn.
彼は相手の弱点を狙って巧みに罠を仕掛けた。
He cleverly set a trap targeting the opponent's weakness.
彼は先に相手に勝負を仕掛けた。
He was the first to challenge his opponent.