This administration might be the exception, but it is actually normal for the US military to be getting more vaccines than average, even when their effectiveness is suspect (some past flu vaccines) or side effects are moderate to severe (e.g. anthrax vaccines).
Readiness - a matter of national security - tends to trump most concerns that, in civilian populations, might warrant greater choice and debate.
Back during the Iraq war, it even applied to civilians who deployed into the war zone. I had to get yellow fever and smallpox. I was just a software engineer that worked for the navy, but I had to do so I could go do my job over there.
You'd think other aspects of health, like general fitness and mental well-being would be factored in too, but strangely, the only requirement they seemed to take a hard stance on previously was over-vaccination.
Almost like it was politically-motivated and it's not truthfully a "matter of national security"
Readiness - a matter of national security - tends to trump most concerns that, in civilian populations, might warrant greater choice and debate.