World War II: <a href="https://en.wikipedia.org/wiki/Commonwealth_of_the_Philippines" id="mw4A" rel="mw:WikiLink" title="Commonwealth of the Philippines">Philippine Commonwealth</a> troops under the Philippine Commonwealth Army units enter the province of Ilocos Sur in Northern Luzon and attack invading <a href="https://en.wikipedia.org/wiki/Imperial_Japanese_Army" id="mw4Q" rel="mw:WikiLink" title="Imperial Japanese Army">Japanese Imperial forces</a>.<sup about="#mwt145" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-27"}}' id="cite_ref-27" rel="dc:references" typeof="mw:Extension/ref"><a href="./January_8#cite_note-27" id="mw4g" style="counter-reset: mw-Ref 27;"><span class="mw-reflink-text" id="mw4w">[27]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-27"><cite about="#mwt142" class="citation book cs1" id="CITEREFKalinangan_Group1986">Kalinangan Group (1986). <a class="external text" href="https://books.google.com/books?id=AmseAAAAMAAJ" id="mwCXo" rel="mw:ExtLink nofollow"><i id="mwCXs">The Philippines, Land and People: Atang</i></a>. Kalinangan Group. p.<span id="mwCXw" typeof="mw:Entity"> </span>79. <a class="mw-redirect" href="./ISBN_(identifier)" id="mwCX0" rel="mw:WikiLink" title="ISBN (identifier)">ISBN</a><span id="mwCX4" typeof="mw:Entity"> </span><a href="./Special:BookSources/978-971-8518-00-7" id="mwCX8" rel="mw:WikiLink" title="Special:BookSources/978-971-8518-00-7"><bdi id="mwCYA">978-971-8518-00-7</bdi></a>.</cite><span about="#mwt142" class="Z3988" id="mwCYE" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=The+Philippines%2C+Land+and+People%3A+Atang&amp;rft.pages=79&amp;rft.pub=Kalinangan+Group&amp;rft.date=1986&amp;rft.isbn=978-971-8518-00-7&amp;rft.au=Kalinangan+Group&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DAmseAAAAMAAJ&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AJanuary+8"></span></span>