Sigma II-64 war game
... that while a hypothetical coup in South Vietnam was being played in the Sigma II-64 war game, a real coup was staged against General Nguyễn Khánh?
... that while a hypothetical coup in <a href="./South_Vietnam" id="mwAmU" rel="mw:WikiLink" title="South Vietnam">South Vietnam</a> was being played in the <b id="mwAmY"><a href="./Sigma_II-64_war_game" id="mwAmc" rel="mw:WikiLink" title="Sigma II-64 war game">Sigma II-64 war game</a></b>, a real coup was staged against General <a href="./Nguyễn_Khánh" id="mwAmg" rel="mw:WikiLink" title="Nguyễn Khánh">Nguyễn Khánh</a>?