Defense officials have repeatedly emphasized the troops at the border are there to support civil authorities and that they are not expected to come into any contact with migrants.
The defense officials described the force DHS requested as something that would only be used if CPB personnel were overwhelmed by the situation on the border.
"Our first line of effort in support of CBP is hardening the ports of entry and addressing key gaps", Manning said, referring to U.S. Customs and Border Protection.
"We're going to have tents". Captain Bill Speaks, another Pentagon spokesman added, "we have not received a request from DHS to build facilities to house migrant families".
"They want to throw rocks at our military, our military is going to fight back ... we will consider that a firearm" he had said on Thursday.
Around 4,800 United States soldiers were deployed yesterday to the border with Mexico, the Pentagon announced, saying it could not give a price tag for the operation Democrats decry as political maneuvering from President Donald Trump.More news: US, China trade war stupid
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"Barbed wire looks like it's going to be very effective, too, with soldiers standing in front of it", Trump told a campaign rally in Cleveland. There are reports that this deployment could cost upwards of $200 million.
A separate contingent of about 2,100 National Guard troops had already been deployed to work with Border Patrol in anticipation of the caravans, which have about 7,000 people total, according to the Defense Department.
"The rest of the day in the southwest border region would be deployed 5.2 thousand soldiers".
Pentagon spokesperson Colonel Rob Manning said on Monday that the Department was now considering the deployment of some 7,000 troops in total, although he acknowledged that it will depend on the needs of the border security forces who are responsible for the operation. Mr. Trump has blasted illegal immigration in the past, and called for the importance of border security.
Trump's push to send the military to the border comes ahead of Tuesday's mid-term congressional elections and has triggered sharp reactions, with critics calling it a political stunt that misuses us military resources.