Welcome to the forum. You are not just a war veteran but a T veteran too.
There are many reasons which can trigger or aggravate tinnitus including but not limited to drug reaction or side-effects from ototoxic drugs, ear wax build-up, ear or Eustachian tube infection or ETD, ear drum injury, fluid build-up feeling pressured, TMJ, TTTS, high blood pressure or blood circulation problem, loud noise exposure, acoustic trauma/shock, head trauma & injury, neck injury or muscle problems, hearing loss, Meniere's, barotrauma from sudden change of air pressure such as flights, slapping of the ears, grief for the loss of loved ones, untreated sleep apnea, elevated stress, anxiety & panic disorder, etc. See if you have any of those above to explain the increased loudness.
If anything, you can check out the treatment and alternative treatment sections on TT to see if anything can help your situation. Some members reported positive results such as Trobalt, stem cells or even some supplements. You are welcome to browse the resources on TT. Being a T veteran, you can also help share your insights how to cope with T for so long. Wish you well. Take care. God bless.