The latest phase of the war is less about maneuvers and operations than alliance politics and shifting allegiances.

Ukrainian President Volodymyr Zelensky has said that the United States wants a peace settlement between Ukraine and Russia by early summer, despite repeated rounds of talks failing to reach a breakthrough over the issues of territory and security guarantees.

By Olena Harmash KYIV, Feb 5 (Reuters) - Ukraine and Russia concluded a second day of U.S.-brokered talks in Abu Dhabi on Thursday to end Europe's most destructive conflict since World War Two, agreeing to a major prisoner swap,

President Trump will let a treaty to limit nuclear weapons for the U.S. and Russia expire on Thursday, he confirmed in a social media post. The New Strategic Arms Reduction Treaty (New START) was set to end Feb.

The number of deaths, injuries and missing is approaching a grim milestone after nearly four years of fighting.

There are still strong incentives to negotiate reductions in nuclear arsenals between the United States, Russia, and China.