Complex sentence: On May 24,1915, "Zrinyi" and her sister ships bombarded the Italian coast, mainly the important naval base at Ancona, which was several days after the entrance of Italy into the war on the side of the Triple Entente.
Split into simpler sentences: On May 24,1915, "Zrinyi" and her sister ships bombarded the Italian coast, mainly the important naval base at Ancona. This occurred several days after the entrance of Italy into the war on the side of the Triple Entente.