Soviet side and Dubček, Ludvík Svoboda, Oldřich Černík, Josef Smrkovský and others on the Czechoslovak side, Dubček defended the proposals of the KSČ's reformist wing while pledging commitment to the Warsaw Pact and Comecon. The KSČ leadership, however, was divided between vigorous reformers (Smrkovský, Černík, and František Kriegel) and hardliners (Vasil Biľak, Drahomír Kolder, and Oldřich Švestka) who adopted an anti-reformist stance. Brezhnev decided on compromise. The KSČ delegates reaffirmed their loyalty to the Warsaw Pact and promised to curb "anti-socialist" tendencies, prevent the revival of the Czechoslovak Social Democratic Party and control the press more effectively. The Soviets agreed to withdraw their armed forces still in Czechoslovakia after manoeuvres in June and permit the 9 September Party Congress. On 3 August representatives from the "Warsaw Five" and Czechoslovakia met in Bratislava and signed the Bratislava Declaration. The declaration affirmed unshakable fidelity to Marxism-Leninism and proletarian internationalism, declared an implacable struggle against "bourgeois" ideology and all "anti-socialist" forces. The Soviet Union expressed its intention to intervene in any Warsaw Pact country if a "bourgeois" system—a pluralist system of several political parties representing different factions of the "capitalist classes"—was ever established. After the conference, the Soviet troops left Czechoslovak territory but remained along its borders. Soviet invasion As these talks proved unsatisfactory, the Soviets began to consider a military alternative. The Soviet policy of compelling the socialist governments of its satellite states to subordinate their national interests to those of the Eastern Bloc (through military force if needed) became known as the Brezhnev Doctrine. On the night of 20–21 August, Eastern Bloc armies from four Warsaw Pact countries—the Soviet Union, Bulgaria, Poland and Hungary—invaded the ČSSR. That night, 200,000 troops and 2,000 tanks entered the country. They first occupied the Ruzyně International Airport, where air deployment of more troops was arranged. The Czechoslovak forces were confined to their barracks, which were surrounded until the threat of a counter-attack was assuaged. By the morning of 21 August Czechoslovakia was occupied. Romania and Albania refused to take part in the invasion. Soviet command refrained from drawing upon East German troops for fear of reviving memories of the Nazi invasion in 1938. During the invasion 72 Czechs and Slovaks were killed (19 of those in Slovakia), 266 severely wounded and another 436 slightly injured. Alexander Dubček called upon his people not to resist. Nevertheless, there was scattered resistance in the streets. Road signs in