According to data published in 2021, there are about 16.5 million veterans in the US. Veterans have been a part of American history for a long time, and their efforts to protect and serve their nation have been memorialized since at least the end of the Civil War. However, coming home after active duty can be stressful. Your body and mind have yet to adjust to a life free from rules, regulations, and protocols, which is why it is not uncommon for veterans to feel unwell after returning from service.