[4][5][6] As of March 2018, the group had 250 volunteers operating in the Altar Valley around Sasabe, Arizona,[5][7][8][9][10] armed with personal weapons including pistols, shotguns and semi-automatic rifles.

AZBR originally targeted illegal immigration, but as of 2015 had a stated goal of disrupting drug smuggling and trafficking across the United States–Mexico border[4] and preventing infiltration by foreign terrorists.

[12] The group took part in the Mother of All Rallies held on September 16, 2017, at the National Mall in Washington, D.C. in support of President Donald Trump, where Foley was one of the speakers.

[13] In August 2019, the expelled member Joshua Pratchard was sentenced with six years to prison for illegal gun ownership, manufacture of firearms and their sale.

[14][15] The militia expelled him, saying he did not want to follow their rules, including repeatedly asking to get physical with detainees and demanding to put a silencer on his weapon, and their recklessness when it comes to "stalking bandits".