After nine months into the new government, discontent found expression in a fundamentalist movement which attempted to dismantle Constitution and revert it with a monarchy. The Ottoman counter-coup of 1909 gained traction when Sultan promised to restore the Caliphate, eliminate secular policies, and restore the rule of Islamic law, as the mutinous troops claimed. CUP also eliminated the time for religious observance. Unfortunately for the advocates of representative parliamentary government, mutinous demonstrations by disenfranchised regimental officers broke out on 13 April 1909, which led to the collapse of the government. On 27 April 1909 counter-coup put down by "31 March Incident" using the 11th Salonika Reserve Infantry Division of the Third Army. Some of the leaders of Bulgarian federalist wing like Sandanski and Chernopeev participated in the march on Capital to depose the "attempt to dismantle constitution". Abdul Hamid II was removed from the throne, and Mehmed V became the Sultan.