Acting Defense Secretary Patrick Shanahan approved the re-allocation of funds, which were originally earmarked for support of Afghan security forces and other projects, to help pay for the wall along the southern border.
"Today, I authorized the transfer of $1.5 billion toward the construction of more than 80 miles of border barrier," he said. "The funds were drawn from a variety of sources, including cost savings, programmatic changes, and revised requirements, and therefore will have minimal impact on force readiness."
In March, Shanahan approved the first transfer of Defense Department dollars and redirected $1 billion to help build nearly 60 miles of wall in Yuma, Ariz. and El Paso, Texas.
The combined total of $2.5 billion is in response to President Trump’s declaration of a national emergency at the border.