An attorney representing the families said they are seeking personal injury damages, primarily for the children involved.
A T-6 Texan trainer jet from Joint Base San Antonio-Randolph crashed roughly 30 miles from the base.
Some military family members can renew their military ID cards online, thereby keeping ID card office visits short.
T-6 operations took a brief pause at Randolph because pilots were concerned about the aircraft's oxygen generating systems.
Mattis charged that President Donald Trump has failed in his duties to the Constitution and the American people.
Army Secretary Ryan McCarthy told AP that the reversal came after Esper attended a meeting at the White House.
Airman First Class Natasha Aposhian, 21, and Airman First Class Julian Carlos Torres, 20, both died in the incident.
Currently, about 20,400 Guard troops have been activated in 28 states and the District of Columbia.
Brig. Gen. Harvey is under investigation for a matter that "does not involve criminal activity or safety," USAREUR said.
