Completed the following sentence: In 1968, the Soviet Union and four other member states of the Warsaw Pact, building on the doctrine of <unk>limited sovereignty<unk>,
invaded Czechoslovakia in gross violation of the principle of non-interference in internal affairs (Article 2{7}, Chapter I of the United Nations Charter) <unk> invaded Czechoslovakia in gross violation of the principle of non-interference in internal affairs (Article 2{7}, Chapter I of the United Nations Charter) ️<unk>️<unk>️<unk>️<unk>️<unk>️ <unk> <unk> <unk> ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ Of the mobilized Hungarian personnel, four were killed in accidents.<unk> Of the mobilized Hungarian personnel, four were killed in accidents.