World War II: The United States <a href="https://en.wikipedia.org/wiki/Battle_of_Saipan" id="mwARw" rel="mw:WikiLink" title="Battle of Saipan">invades Saipan</a>, capital of Japan's <a href="https://en.wikipedia.org/wiki/South_Seas_Mandate" id="mwAR0" rel="mw:WikiLink" title="South Seas Mandate">South Seas Mandate</a>.