Complex sentence: He became a war correspondent for the popular Red Army newspaper "Krasnaya Zvezda" (Red Star) and covered the major events of the conflict, including the Battle of Moscow, the Battle of Stalingrad, the Battle of Kursk and the Battle of Berlin.
Split into simpler sentences: He became a war correspondent for the popular Red Army newspaper "Krasnaya Zvezda" (Red Star). As the war raged on, he covered its major events, including the Battle of Moscow, the Battle of Stalingrad, the Battle of Kursk and the Battle of Berlin.