When and why has the National Guard been deployed in the US before? | Donald Trump News | Al Jazeera
The US reserve military force is activated for federal missions and state emergencies, from disasters to civil unrest.| Al Jazeera
The US reserve military force is activated for federal missions and state emergencies, from disasters to civil unrest.| Al Jazeera
The law generally prevents the president from using the military as a domestic police force.| Brennan Center for Justice
