<a href="https://en.wikipedia.org/wiki/World_War_I" id="mwsg" rel="mw:WikiLink" title="World War I">World War I</a>: The <a href="https://en.wikipedia.org/wiki/United_States_declaration_of_war_on_Germany_(1917)" id="mwsw" rel="mw:WikiLink" title="United States declaration of war on Germany (1917)">United States declares war on Germany</a>.