"The Arizona National Guard will deploy 225 members of the Guard today to support border security measures", the state militia said in a statement.
Brown's announcement last week did not address what specific jobs the California Guard would and would not do and how state officials would distinguish work related to immigration from other aspects of border enforcement, such as fighting criminal gangs and drug and gun smuggling.
Also a deputy assistant secretary at the Defense Department, Robert Salesses, claimed California has diminished to commit more than 200 troops to the campaign.
California's Democratic Gov. Jerry Brown, who has repeatedly come in President Trump's political crosshairs, received rare praise from the president last week after he agreed to installing 400 troops in the National Guard's third large-scale border mission since 2006. It will not be a mission to round up woman and children or detain people escaping violence and seeking a better life.
Acting U.S. Customs and Border Protection Deputy Commissioner Ronald D. Vitiello says California's governor has determined that some tasks federal officials want the state's National Guard to perform at the U.S. -Mexico border are "unsupportable". The other border-state governors - all Republicans - have openly embraced Trump's plans.
Brown's office was noncommittal about how numerous 400 additional guardsmen would be sent to the border, The Daily Caller News Foundation previously reported.
Talks are ongoing and the federal government has yet to publicly respond to Brown's demand that troops avoid immigration enforcement or the state's position on avoiding the specific jobs proposed, the officials said.
Brown last week characterized his decision to contribute troops as a welcome infusion of federally funded support to fight transnational criminal gangs and drug and firearms smugglers.
"The location of Guard personnel - and number specifically working in support of operations along the border, the coast and elsewhere in the state - will be dictated by the needs on the ground", a spokesperson for Brown's office told TheDCNF in a Wednesday email.
The Trump administration said Monday that California Gov.
Trump wants to send up to 4,000 troops to the border and has commitments for about 2,400 from those states and California. Earlier this month, President Donald Trump and Protection Secretary James Mattis licensed Upto 4,000 National Guard staff that will assist the Department of Homeland Protection secure the border from several southwestern USA states.