Complex sentence: After liberation by Americans in 1945, Mušič returned to Ljubljana, but was subjected to the pressures of the newly established Communist regime and moved to Gorizia already at the end of June 1945.
Split into simpler sentences: After liberation by Americans in 1945, Mušič returned to Ljubljana. There, he was subjected to the pressures by the newly established Communist regime and moved to Gorizia already at the end of June 1945.