Complete the following sentence: The Czechoslovak Communist Party began an ambitious reform agenda under Alexander Dubček. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️
massive military invasion by Warsaw Pact forces that destroyed the threat of internal liberalization. At the same time, the Soviets threatened retaliation against the British-French-Israeli invasion of Egypt.<unk> At the same time, the Soviets threatened retaliation against the British-French-Israel invasion of Egypt. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️