The Republic of Texas Army has been the primary defender of the republic since the republic reasserted itself. If you doubt that, you need simply ask them and they will happily inform you. Texas Army troops and tanks stood against the might of the United States military during what they still like to call the Second Civil War, shattered the Mexican Drug Cartels, helped to halt the Chinese advance in Indonesia, and participated in the final assault against the Singapore Collective. The Army defended Texas colonies on Luna, Mars, Venus, the outer planets, and interstellar colonies over the following centuries. They defended numerous United States and Western Alliance colonies before The War, and Texas Army troops, tanks, and attack craft led the invasion of many worlds during the Hyades Campaign. The Texas Army has been the single largest national army in the Western Alliance since it was founded, and they have always been a common sight throughout Alliance space.