SACRAMENTO, Calif. — California Gov. Jerry Brown agreed Wednesday to take money, but not marching orders, from President Donald Trump in deploying 400 National Guard troops to various locations around the state, insisting that any service members near the border would not enforce federal immigration law.

“Your funding for new staffing will allow the Guard to do what it does best: support operations targeting transnational criminal gangs, human traffickers and illegal firearm and drug smugglers along the border, the coast and throughout the state,” Brown wrote in a letter to Homeland Security Secretary Kirstjen Nielsen and Defense Secretary James N. Mattis.

Brown was the last of the nation’s border governors to respond to Trump’s request for a beefed-up presence. In his letter, he said that he wanted to be “crystal clear” in what he was agreeing to provide.

“This will not be a mission to build a new wall,” Brown wrote. “It will not be a mission to round up women and children or detain people escaping violence and seeking a better life. And the California National Guard will not be enforcing federal immigration laws.”

Although Brown may have taken longer to act than governors in the other border states — Texas, New Mexico and Arizona all pledged assistance earlier in the week — only eight days passed between the California Democratic governor’s decision and the president’s off-the-cuff remark about assisting with border duties. Last week, Trump told reporters that his administration would be “guarding our border with the military,” a statement his staff later amended to focus instead on help from the National Guard.

By the weekend, Mattis had signed an order to send up to 4,000 National Guard troops from various states to the border, but barred them from interacting with migrants detained by the U.S. Border Patrol in most cases. At the time, a spokesman for Brown said the request was still under consideration.

Less than one-tenth of the United States’ 1,933-mile border with Mexico is in California. And the decision Wednesday does not guarantee that California’s 400 additional Guard personnel will be in any specific location. The state’s current efforts on transnational crimes include 250 troops, with 55 of them stationed at the border. A spokesman for Brown said Wednesday that decisions on staffing would be made based on needs as they are identified.

There was no immediate estimate of the amount in federal funds California would receive to cover the costs of the California deployment. A copy of the agreement signed by Brown says the operation will end Sept. 30 unless federal and state officials agree to extend it. The agreement also says that Brown or the Trump administration can cancel the effort at any time.