While some black regiments remained throughout the South performing occupation duties, others were sent to Texas to perform a combination of duties. They were keeping the peace and helping freedmen transition to freedom, but they were also sent to Texas to counter French aggression in Mexico. In Texas the troops would have to endure being even farther away from their families, in more remote and difficult terrain and in disease-ridden conditions. Additionally, homesickness, the terrible conditions, and the increase in idle time and boredom all led to a breakdown in order and professionalism among the officers and the men, which in turn led to an increase in tension between the two groups. Black troops’ discontent arose from knowing that, while white troops continued to be mustered out of service and returned home, they were headed to Texas. They were also upset about being farther away from their families and the paymaster. One positive outcome of occupation duty for black troops was their greater access to literacy programs. By September 1865, Union policy shifted against the continued use of black regiments. Union officials, including General Ulysses S. Grant, determined it was best to release all northern-raised black troops from military service.