SANAA — When Yemen's President Ali Abdullah Saleh ordered his military March 18 to fire on peaceful protesters calling for his resignation, he sealed his fate. A wave of military, government and diplomatic defections, led by his longtime ally First Armored Brigade Commander General Ali Muhsin al-Ahmar, rocked his regime.

Although al-Ahmar announced that he was appalled by the use of force and vowed to defend the constitution, his decision was anything but altruistic. The disgruntled general, who has long-standing ties to the type of jihadists that the United States is battling in Yemen, merely sought to settle a score with the president's family.

The relationship between al-Ahmar and Saleh extends to their youth, with Saleh's mother having had a second marriage to al-Ahmar's uncle. Though they are not half-brothers, this frequent, if mistaken reference, indicates their closeness. Al-Ahmar has long been considered either Saleh's right-hand man or the country's hidden president.