He served in the United States Army during the War in Afghanistan, and sustained burns to thirty percent of his body due to an improvised explosive device injury in 2008.

[2][3] He ran again in 2024, this time winning the Republican Party nomination, but lost to Democratic incumbent Senator Jacky Rosen in the general election.

[4] Brown was born in Arkansas into a military family; his father and two younger brothers also served in the War on Terror after the September 11th attacks.

[7] In September 2008, while supporting the multinational cooperative project of delivering a turbine to the Kajaki Dam,[8] he and his soldiers were wounded by an improvised explosive device when responding to another US Army unit that was ambushed and in a direct fire.

[17][18] He raised over $1 million every quarter of his campaign as he challenged Adam Laxalt, a Republican who was endorsed by Donald Trump for the US Senate seat.

[23] As of August 2023, the Duty First PAC had spent most of the contributions it had received to repay debts from Brown’s 2022 campaign, with 7% of its spending going to other Republican candidates.

[24] In July 2023, Brown announced his second candidacy for a Nevada U.S. Senate seat, this time challenging incumbent Democrat Jacky Rosen in the 2024 election.

[33] Brown was a featured speaker at the 2024 Republican National Convention in Milwaukee,[34] speaking on unity and the high cost of war.

The state chapter's efforts focused on "combating human trafficking, advocating for meaningful criminal justice reform, and supporting the devastated communities recovering from the COVID-19 shutdowns.