Over the roughly two decades that Russian President Vladimir Putin has been in power, he's dedicated a lot of time and money to building up and modernizing Russia's military. In the process, Putin garnered a reputation as a force to be reckoned with and was widely viewed as one of the most powerful leaders in the world. But the war in Ukraine has decimated the Russian military that Putin spent years building, while raising questions about his grip on power, Russia experts and military analysts told Insider. "Russia's invasion of Ukraine has been a strategic defeat. So far the Kremlin...