<a href="https://en.wikipedia.org/wiki/Mexican–American_War" id="mwVg" rel="mw:WikiLink" title="Mexican–American War">Mexican–American War</a>: President <a href="https://en.wikipedia.org/wiki/Mariano_Paredes_(President_of_Mexico)" id="mwVw" rel="mw:WikiLink" title="Mariano Paredes (President of Mexico)">Mariano Paredes</a> of Mexico unofficially declares war on the United States.