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), Khmer Rouge soldiers raided the islands of Phu Quoc and Tho Chau, killing more than five hundred Vietnamese civilians; following the attack, the islands were swiftly recaptured by Hanoi. Even then, the first reactions of the Vietnamese were ambiguous, and it took Vietnam a long time to react with force, for the first impulse was to arrange matters "within the family sphere".<unk> Even then, the first reactions of the Vietnamese were ambiguous, and it took Vietnam a long time to react with force, for the first impulse was to arrange matters "within the family sphere".<unk>