 Complete the following phrase:  In case of emergency, a last chance existed for the actual king in power to mobilize the population suddenly. Every noble, no matter his social class, had to participate in person with his weaponry and all of his personal guards made available. These were the estate armies. Whenever they were called upon, they were not allowed to fight for longer than 15 days, and their field of operations was restricted to within the borders of Hungary. The so-called insurrectio noble insurrection was nothing more than an obsolete form of drafting, but it was valid until the 