did he participate in any coup?
Yes. He was a part of June-July 2013 coup
Abdel Fattah el-Sisi
On 24 July 2013, during a speech at a military parade, el-Sisi called for mass demonstrations to grant the Egyptian military and police a "mandate" to crack down on terrorism. 
who was antiochus x eusebes? A Hellenistic Seleucid monarch who reigned as the King of Syria where was he born? UNANSWERABLE who succeeded him? Demetrius III whom did eusebes marry? Cleopatra IV of Egypt and Cleopatra Selene did her husband engage in any battle? UNANSWERABLE what is the origin of the second queen? She was the daughter of Ptolemy VIII and Cleopatra III of Egypt did she have any issues? UNANSWERABLE what was her relation to the tenth ptolemy? She was his mother name a place she ruled as a queen. Egypt can you mention any one dynasty that ruled this place? The Muhammad Ali dynasty can you name a ruler belonging to this lineage? Muhammad Ali Pasha at present , who is the president of this place? Abdel Fattah el-Sisi
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Abdel Fattah el-Sisi [SEP] Civil uprising, coup d'état and transition
While supporters interpreted this to mean that el-Sisi felt the need of the people to prove to the world that it was not a coup but the popular will, the statement was seen by opponents as contradicting the military's pledges to hand over power to civilians after removing Morsi and as indicating an imminent crackdown against Islamists.