ISW: Russia "unlikely to overcome fundamental structural challenges" with mobilization.

"I told (Trump) that we would like to consider guarantees for 30, 40, or even 50 years, and that would be a historic decision by president Trump. The president said he would think about it," President Volodymyr Zelensky said.

Russian troops shot dead two unarmed Ukrainian prisoners of war on Dec. 27 in the village of Shakhove near Pokrovsk in Donetsk Oblast, Ukraine’s Prosecutor General’s Office reported on Dec. 29, in what appeared to be at least the third reported case this month of captured Ukrainian soldiers being killed after being taken prisoner.

Explosions reportedly rocked the Khanskaya military airfield near the southern Russian city of Maykop as air defenses were engaged late on Dec. 29.

"They're going to be helping. Russia is going to be helping," U.S. President Donald Trump said when asked if Moscow would hold any responsibility for Ukraine's reconstruction.

U.S. President Donald Trump said on Dec. 28 that he held a phone call with Russian President Vladimir Putin ahead of his scheduled meeting with Ukrainian President Volodymyr Zelensky.

Russian troops opened artillery fire against the Kherson Thermal Power Plant (TPP), causing significant damage, head of Ukraine's Naftogaz said on Dec. 28.

IAEA Director General Rafael Grossi thanked "both sides" for agreeing to a temporary "window of silence," which is "part of ongoing efforts to prevent a nuclear accident during military conflict."

In this year-end wrap-up of Ukraine This Week, the Kyiv Independent’s Anna Belokur looks back at the moments that defined 2025, the fourth year of Russia's full-scale invasion of Ukraine — from stalled peace efforts and escalating Russian attacks to mass anti-corruption protests and political upheaval at home.

The refinery was attacked multiple times in the night, residents claimed. An electrical substation in Syzran was also hit, causing blackouts in the city.

Ukrainian and Russian troops have been publishing conflicting claims and videos about who controls the front-line town of Myrnohrad, located just northeast of the embattled town of Pokrovsk.

Russia has lost around 1,204,510 troops in Ukraine since the beginning of its full-scale invasion on Feb. 24, 2022, the General Staff of Ukraine's Armed Forces reported on Dec. 28.