An example of a more complex operation is one by 2 Royal Green Jackets in late 1965, with battalion tactical HQ on the border ridge. It involved one company swimming a river to get behind an enemy base, a second company ambushed the river, when the Indonesian mortars in the base opened fire on the ambush area they were engaged by the battalion's mortars that had been brought forward. This caused some Indonesians to flee their base into the ambush by the first company.