Editor’s Note: Brian Bonner, the Kyiv Post’s chief editor from 2008-2021, is the host of Hromadske Radio’s podcast “Ukraine Calling.” This weekly English-language program, released on Fridays, can be found on Hromadske’s YouTube channel and website, as well as on Spotify, Apple Podcasts, SoundCloud, Google Podcasts, and Twitter. In Israel, every citizen can be drafted into the military at the age of 18. In Turkey, the age is 20. When the United States fought its ill-fated war in Vietnam, it sent men into battle at 18 – as many other nations do today. More ominously, Russia lowered its draft ag…