As political instability grew in Syria, delegations from the country were sent to Nasser demanding immediate unification with Egypt. Nasser initially turned down the request, citing the two countries' incompatible political and economic systems, lack of contiguity, the Syrian military's record of intervention in politics, and the deep factionalism among Syria's political forces. However, in January 1958, a second Syrian delegation managed to convince Nasser of an impending communist takeover and a consequent slide to civil strife. Nasser subsequently opted for union, albeit on the condition that it would be a total political merger with him as its president, to which the delegates and Syrian president Shukri al-Quwatli agreed. On 1 February, the United Arab Republic (UAR) was proclaimed and, according to Dawisha, the Arab world reacted in "stunned amazement, which quickly turned into uncontrolled euphoria." Nasser ordered a crackdown against Syrian communists, dismissing many of them from their governmental posts.
What Syrian group did Nasser crack down on?
communists