End of <a href="https://en.wikipedia.org/wiki/Provisional_Revolutionary_Government_of_the_Republic_of_South_Vietnam" id="mwARU" rel="mw:WikiLink" title="Provisional Revolutionary Government of the Republic of South Vietnam">South Vietnam</a>; Communist <a href="https://en.wikipedia.org/wiki/North_Vietnam" id="mwARY" rel="mw:WikiLink" title="North Vietnam">North Vietnam</a> annexes the former <a href="https://en.wikipedia.org/wiki/South_Vietnam" id="mwARc" rel="mw:WikiLink" title="South Vietnam">South Vietnam</a> to form the unified <a href="https://en.wikipedia.org/wiki/Vietnam" id="mwARg" rel="mw:WikiLink" title="Vietnam">Socialist Republic of Vietnam</a>.