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

Pope Francis has called for a “negotiation” to end the war in Ukraine in a Christmas Day message where he appealed for weapons to be laid down in global conflicts and reconciliation between enemies.

Russia attacked Ukraine's energy system and some cities in an "inhuman" Christmas Day assault, Ukraine's President Volodymyr Zelenskyy said.

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.

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.

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,

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

A ballistic missile struck an apartment building in the central Ukrainian city of Kryvyi Rih on Tuesday, killing one person and injuring 15, four of them seriously, officials said.

Hence the Trembita, which is one of several missile projects the country hopes will ignite a resurgence in its domestic industry. In the Soviet era, Ukraine was a world leader in space and rocket innovation.