 Poland could threaten Soviet strength and power in Eastern Europe politically, and the Soviet Union could essentially destroy the Polish economy.Therefore, any reform in the Polish government would have to concede to some Soviet demands, while the Soviets concurrently would have to concede to a vital partner.A high-level delegation of the Soviet Central Committee flew to Poland in an attempt to block removing pro-Soviet members of Politburo mainly Soviet and Polish Marshal Konstantin Rokossovsky.