I agree with
@dsuke and
@Anreon , the meaning of coup d'état here is an unlawfull governement overturn made by someone already in the governement/political circle (but not having the higher authority at the start) it can be enforced by military support and end in a violent takeover of the state or by the surrender of the original governement under an insolvable threat (military, economical or political).
It's quite different from a rebellion or a revolution because the people of the country aren't involved in it.
For exemple Napoleon did a coup d'état on november 1799 to become head of the state (he was a general before that), but the bolcheviks got to control Russia through a popular uprising, so it was a revolution.
And the term "coup d'état" has absolutely nothing to do with martial arts or a brave deed in combat...
A "coup d'éclat" or a "coup d’arrêt " might be closer to what the PR was describing but a "coup d'état" has nothing to do with that.