Ukrainian President Volodymyr Zelenskyy said he’s “sincerely thankful” to the US for the new round of $800 million in military assistance. In his daily late-night address to the nation, Zelenskyy also said he was thankful for Wednesday’s visit by the presidents of Poland, Estonia, Lithuania and Latvia. In his telephone conversation with US President Joe Biden, Zelenskyy said they discussed the new weapons shipment, even tougher sanctions against Russia and efforts to bring to justice those Russian soldiers who committed war crimes in Ukraine. Western weaponry pouring into Ukraine helped blunt Russia's initial offensive and seems certain to play a central role in the approaching, potentially decisive, battle for Ukraine's contested Donbas region. Yet the Russian military is making little headway halting what has become a historic arms express. The US numbers alone are mounting: more than 12,000 weapons designed to defeat armored vehicles, some 1,400 shoulder-fired Stinger missiles to shoot down aircraft and more than 50 million rounds of ammunition, among many other things. Dozens of other nations are adding to the totals. Biden on Wednesday approved another $800 million worth of military assistance, including additional helicopters and the first provision of American artillery. These armaments have helped an under-gunned Ukrainian military defy predictions that it would be quickly overrun by Russia. They explain in part why Russian President Vladimir Putin’s army gave up, at least for now, its attempt to capture Kyiv, the capital, and has narrowed its focus to battling for eastern and southern Ukraine. As the fighting intensifies in the Donbas and perhaps along the coastal corridor to the Russian-annexed Crimean Peninsula, Putin may feel compelled to strike harder at the arms pipeline, which Zelenskyy has called vital to his nation's survival. Subscribe to our YouTube channel: https://bit.ly/2TwO8Gm Subscribe to our newest channel Quicktake Explained: https://bit.ly/3iERrup Bloomberg Quicktake brings you live global news and original shows spanning business, technology, politics and culture. Make sense of the stories changing your business and your world. To watch complete coverage on Bloomberg Quicktake 24/7, visit http://www.bloomberg.com/qt/live, or watch on Apple TV, Roku, Samsung Smart TV, Fire TV and Android TV on the Bloomberg app. Have a story to tell? Fill out this survey for a chance to have it featured on Bloomberg Quicktake: https://cor.us/surveys/27AF30 Connect with us on… YouTube: https://www.youtube.com/user/Bloomberg Breaking News on YouTube: https://www.youtube.com/c/BloombergQuickTakeNews Twitter: https://twitter.com/quicktake Facebook: https://www.facebook.com/quicktake Instagram: https://www.instagram.com/quicktake