World War II: <a href="https://en.wikipedia.org/wiki/Union_of_South_Africa" id="mwlA" rel="mw:WikiLink" title="Union of South Africa">Union of South Africa</a> <a href="https://en.wikipedia.org/wiki/Military_history_of_South_Africa_during_World_War_II" id="mwlQ" rel="mw:WikiLink" title="Military history of South Africa during World War II">declares war</a> on Germany.