"Under the supervision of our world-class medical professionals, war fighters age 30 and older are going to be tested annually for testosterone levels as part of their periodic health assessment,” Defense Secretary Pete Hegseth said in a video posted to X captioned: “The High-T Department of War.”
...
"He framed the annual screening test as part of an investment in “the individual warfighter,” calling the service members “our most decisive tactical advantage.”

Aren't there women in the military?

The testosterone craze fuels fear — not masculinity.
"The resurgence of masculinity as a cultural value, combined with the various struggles of modern males, has contributed to a new obsession among some men: a desire for higher testosterone. But this trend misunderstands what the hormone actually does."
...
"most traditionally manly men — husbands, dads, hard workers, soldiers — often have low testosterone."