Depending of course of the country in question and the circumstances, the federal government's biggest problem if a war was imminent would be gaining the support of the citizens, which would be needed to raise an army.
I believe the answer is D, He invaded northern India in the 1520's and established the Mughal Empire.
Answer: The Mexican Federal Constitution of 1824 was Mexico's first constitution, drafted after the overthrow of Emperor Agustín de Iturbide. The Constitution of 1824 transformed Mexico into a federal republic, governed by a national president, congress, and supreme court, but with lots of power also given to the states.
Explanation: