Thousands of additional active-duty U.S. troops have been ordered, according to CNN, to deploy to the southern US border with Mexico just two days after President Donald Trump directed the military to strengthen its presence there, according to officials familiar with the matter.

Current data indicates that approximately 2,200 active-duty troops are already stationed at the border as part of the “Joint Task Force – North,” the border mission of the U.S. Northern Command based in El Paso, Texas. These troops assist U.S. Customs and Border Protection primarily with logistical and administrative tasks, such as data entry, surveillance, monitoring, and vehicle maintenance.

It remains unclear which specific units have been ordered to deploy to the border.

There is also a National Guard detachment at the border, called “Operation Lonestar,” led by the Texas National Guard, though the number of personnel involved is unknown.

The additional troops being sent to the border this week will largely perform tasks similar to those already being carried out by existing personnel, officials stated, and are expected to support and bolster the Joint Task Force – North.

In other words, they will help maintain the operational readiness of the Border Patrol, assist in command and control centers, and contribute to intelligence gathering for threat assessments and the analysis of migration flows, according to sources familiar with the planning.

The troops are also expected to strengthen aerial capabilities and assist in air operations.

Even more active-duty soldiers are expected to deploy to the U.S.-Mexico border in the coming weeks (Trump has declared a state of emergency there), according to one official, following this initial wave.

It is unclear whether the troops will be armed. None of the active-duty troops have, to date, been authorized to carry out any law enforcement roles, such as making arrests, seizing drugs, or engaging with migrants other than assisting in their transportation to and between various migrant facilities.