Western equipment has slotted in to Ukraine's embattled, Soviet-era military throughout the war, including long-range missiles and advanced fighter jets.

Russian troops appeared to have made inroads into Ukranian territory on Christmas Eve, as well as striking the city of Kharkiv.

Russia launches a Christmas Day missile attack on Ukraine as the war enters its third year. NBC News’ Erin McLaughlin reports on the shifting battleground there and in Washington, D.C.

Pope Francis has called for negotiations between Ukraine and Russia to end the war triggered by Russia's invasion of Ukraine in 2022. In his traditional Christmas Day address, the Pope said "boldness [was] needed to open the door" to dialogue "in order to achieve a just and lasting peace" between the two sides.

Zelensky warns of greater military cooperation between Moscow and Pyongyang, including sending more troops and military equipment

Back then, in the first weeks of the war, Russia and Ukraine conducted several rounds of talks in person and online aimed at ending the conflict; although a framework for peace called the Istanbul Communiqué was drawn up,

Russia’s abandonment of the Assad regime to marshal more resources for the fight against Ukraine vividly illustrates that Putin is ready to sacrifice everything for total victory in the war. Although Putin tries to portray himself as a realist, he has become consumed with Ukraine, to the exclusion of almost all other foreign policy imperatives.

Air-raid alarms and explosions sounded on Christmas Day in Ukraine as Russian missiles and drones targeted the nation’s energy infrastructure. “Today, Putin deliberately chose Christmas for an attack,

The missile has been branded as Ukraine's answer to dwindling Western aid, building self-reliance in defense technologies.

President Joe Biden said on Wednesday he asked the U.S. Defense Department to continue its surge of weapons deliveries to Ukraine after condemning Russia's Christmas Day attack against some of Ukraine's cities and its energy system.