October Revolution Day
A holiday canon was established during the Stalinist period , and included a workers' demonstration , the appearance of leaders on the podium of the Mausoleum , and , finally , the military parade on Red Square , which was held unfailingly every year , and most famously in 1941 , as the Axis forces were advancing on Moscow . 
<triplet> 1941 <subj> Red Square <obj> location