Choi served in the Iraq War from 2006-7 as an Army infantry officer before transferring to active duty in the National Guard in 2008. After coming out on the Rachel Maddow Show in 2009, however, Choi was discharged and immediately became the face of the anti-DADT movement. He participated in a protest of the White House in 2010, leading to a protracted legal battle. Choi unsuccessfully attempted to re-enlist in the Army after the fall of DADT, but was refused due to the trial against him.
In addition to helping to found West Point’s LGBT almuni group, Knights Out, Choi has become a vocal, if controversial, activist, speaking out against Prop 8, Moscow’s ban on Pride parades and the trial of Bradley Manning. He has often been arrested for his involvement and as a result of the White House protest, Choi was fined $100, which he subsequently refused to pay on “moral principle and free-speech grounds.”