World War II: <a href="https://en.wikipedia.org/wiki/Allies_of_World_War_II" id="mw3g" rel="mw:WikiLink" title="Allies of World War II">Allied</a> forces launch the first of <a href="https://en.wikipedia.org/wiki/Battle_of_Monte_Cassino" id="mw3w" rel="mw:WikiLink" title="Battle of Monte Cassino">four assaults</a> on <a href="https://en.wikipedia.org/wiki/Monte_Cassino" id="mw4A" rel="mw:WikiLink" title="Monte Cassino">Monte Cassino</a> with the intention of breaking through the <a href="https://en.wikipedia.org/wiki/Winter_Line" id="mw4Q" rel="mw:WikiLink" title="Winter Line">Winter Line</a> and seizing Rome, an effort that would ultimately take four months and cost 105,000 Allied casualties.