Assertion: regiment's loss | /r/CapableOf | assault entrenched french position
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Source sentences:
text: At Roliça on 17 August, it suffered heavy losses assaulting an entrenched French position, which was taken only after a prolonged defence; at Vimeiro four days later, it held off an attack by Brenier's Brigade, allowing two other British battalions to first regroup, then repulse the attack.