the invasion Attack successfully stopped Process_end alexander UNK 's prague spring liberalisation reforms Reforming_a_system and strengthened Cause_change_of_strength the authority of the authoritarian wing within the communist party Social_event of czechoslovakia ( unk ) .

in the weeks following the invasion , polish forces and contingents from belgium , czechoslovakia , greece and the netherlands participated Participation in the ground campaign ; most also provided Supply air and naval support alongside elements of the royal australian air force , the royal new zealand air force , and the royal norwegian navy .