ocr: Formerly part ofthe Austro-flunganan Empire, Slovalda joined with the Czech Lands to form the Republic of Czechoslovalda - in 1918. 1920 Ireaty ofTrianon sets Czechoslovaldan borders. 1939-1945 Separate Slovak state under pro-Nazi Fr.JozefTiso. 1945 Restoration ofpre-war Czechoslovak state. - - 1947 Communists seize power. 1968 "Prague Spring": briefperiod ofpolitical tolerance and reform, ended by Warsaw Pact invasion. 1969 Federal system introduced. 1989 Demonstrations initiate process leading to democracy. 1990 Free multiparty elections. - - 1993 Jan 1:separate Slovak and Czech states estab ...