Complex sentence: In June 1945, Stalin adopted the title of Generalissimus, and stood atop Lenin's Mausoleum to watch a celebratory parade led by Zhukov through Red Square.
Split into simpler sentences: In June 1945, Stalin adopted the title of Generalissimus. That month, he stood atop Lenin's Mausoleum to watch a celebratory parade led by Zhukov through Red Square.