I like the thinking but I think the preparation for the defense of the base would be the most logical conclusion. Operations in the military can't act that fast because of all the checks and balances put into place since Vietnam. Instant force in the field is something many military and political leaders have put machinery in to prevent. Like the Abrams Doctrine. However in a major event like terrorism, natural disaster, etc local call up in preparation for defending assets and awaiting orders wouldn't be uncommon. In the navy while in port the Papa Flag signals all crew to return immediately for this reason to get the ship ready to get underway. I think the local base commander calling up his reserve forces in response to a perceived major emergency can be considered plausible. But my experience comes from being active duty.