Complex sentence: After the war, the Communists ran unopposed in the 1945 elections; all opposition parties boycotted the elections due to coercion and intimidation by the OZNA secret police and the Communist Party, aimed at eliminating electoral dissent.
Split into simpler sentences: After the war, the Communists ran unopposed in the 1945 elections. All opposition parties boycotted the elections because of coercion and intimidation by the OZNA secret police and the Communist Party, aimed at eliminating electoral dissent.