A day after President Zelenskyy called on the U.N. to hold Russia accountable for its actions in Ukraine, the U.S. and its European allies are set to announce a new round of sanctions on Russia as a new offensive in the eastern part of the country is expected to being. Former Deputy Commander of the U.S. European Command, Lieutenant General Steph Twitty, explains how accusations of war crimes committed by Russian forces could impact how the U.S. is responding to the conflict.  » Subscribe to NBC News: http://nbcnews.to/SubscribeToNBC » Watch more NBC video: http://bit.ly/MoreNBCNews NBC News Digital is a collection of innovative and powerful news brands that deliver compelling, diverse and engaging news stories. NBC News Digital features NBCNews.com, MSNBC.com, TODAY.com, Nightly News, Meet the Press, Dateline, and the existing apps and digital extensions of these respective properties. We deliver the best in breaking news, live video coverage, original journalism and segments from your favorite NBC News Shows. Connect with NBC News Online! NBC News App: https://smart.link/5d0cd9df61b80 Breaking News Alerts: https://link.nbcnews.com/join/5cj/breaking-news-signup?cid=sm_npd_nn_yt_bn-clip_190621 Visit NBCNews.Com: http://nbcnews.to/ReadNBC Find NBC News on Facebook: http://nbcnews.to/LikeNBC Follow NBC News on Twitter: http://nbcnews.to/FollowNBC #Russia #WarCrimes #Ukraine