Armenian Prime Minister Nikol Pashinyan is facing the most significant challenge to his beleaguered rule, although the outcome of the current standoff and any subsequent impact is likely to remain contained to the country. On Feb. 25, Pashinyan warned of an “attempted military coup” after military leaders called on him to resign following months of protests over his widely criticized handling of last year’s war with Azerbaijan over the disputed Nagorno-Karabakh territory. Pashinyan was responding to a letter published earlier in the day signed by Chief of the General Staff Onik Gasparyan and three dozen other military leaders, which stated Pashinyan was “no longer able to make adequate decisions at this current fateful and critical moment” and called on him to resign. Pashinyan also announced that he had dismissed Gasparyan, although that formally requires the approval of the country’s largely ceremonial president, Armen Sargsyan, who reportedly has not endorsed the...