<a href="https://en.wikipedia.org/wiki/World_War_II" id="mw7Q" rel="mw:WikiLink" title="World War II">World War II</a>: <a href="https://en.wikipedia.org/wiki/Nazi_Germany" id="mw7g" rel="mw:WikiLink" title="Nazi Germany">Germany</a> and Italy declare war on the United States, following the Americans' declaration of war on the <a href="https://en.wikipedia.org/wiki/Empire_of_Japan" id="mw7w" rel="mw:WikiLink" title="Empire of Japan">Empire of Japan</a> in the wake of the <a href="https://en.wikipedia.org/wiki/Attack_on_Pearl_Harbor" id="mw8A" rel="mw:WikiLink" title="Attack on Pearl Harbor">attack on Pearl Harbor</a>. The United States, in turn, declares war on them.