With one fell swoop, the catastrophe of October 7 changed a host of security-related paradigms. These changes include a drastic increase in the defense budget after four decades of shrinking its percentage of the GDP; an extension of the duration of obligatory military service after it had been shortened to 32 months and was expected to be cut further; and a massive mobilization of reserve soldiers for the longest period since the Yom Kippur War. Reserve units that had just concluded a 90-100-day stint that included combat in Gaza were demobilized in recent days with the knowledge that they will be called up again for a lengthy period in the coming months.