That is thousands more than the initial plan last week to send 800 active-duty troops at the behest of the Department of Homeland Security and President Trump, who called an approaching caravan of migrants a national emergency.
Pentagon spokesman Capt. Bill Speaks said no final decision on troop numbers had been reached and that planning was ongoing.
The deployment of the active-duty military for border security, first reported by the Wall Street Journal, is a rare move. The report was later confirmed by USA Today. About 2,100 National Guard personnel were sent in April to assist border police with non-law enforcement activities.
This unusual order is a welcome relief for Border Patrol officers, who will now benefit from additional funding and manpower to stop the migrant caravan.