Ukraine this week launched U.S.-made missiles at targets inside Russia.

Ukrainian forces launched a barrage of British-made long-range cruise missiles into Russia, according to multiple reports, in a battle to hold territory ahead of President-elect Donald Trump's term.

The U.S. Embassy in Kyiv has resumed services after closing early Wednesday, but the threat of retaliatory Russian strikes remains.

Retired Army colonel and Global Guardian CEO Dale Buckner is hopeful that a diplomatic solution can be reached next year.

Eight ATACMS missiles were fired at an ammunition depot across the Russian border after President Joe Biden authorized their use against Russia earlier this week.

The U.S. Embassy in Kyiv temporarily closed its doors on Wednesday out of "an abundance of caution."

Ukrainian forces fired American-supplied ATACMS missiles into Russia for the first time, officials said. Russian President Vladimir Putin respond by lowering the threshold for using nuclear weapons.

Russian President Vladimir Putin appeared to threaten to use nuclear weapons if Ukraine fired American-made missiles into Russia.

Russian would consider Ukraine's use of U.S. long-range weapons against Russian forces to be a "qualitatively new round of tensions" between the Moscow and Washington.

The Associated Press fanned out across Ukraine to chronicle a typical 24 hours of life just as the country was about to mark 1,000 days since Russia’s full-scale invasion on Feb. 24, 2022

President Biden has permitted Ukraine to use U.S.-made long-range missiles to strike Russia. These missiles have a range of nearly 200 miles.

Ukraine is expected to soon begin using American-made long-range missiles to hit military targets in Russia's western Kursk region. ABC News’ Patrick Reevell reports from Ukraine.

ABC News’ Patrick Reevell and former Deputy Secretary of Defense for the Middle East Mick Mulroy discuss what Ukraine’s use of U.S. long-range missiles means for negotiations.

U.S. officials say a major factor in the shift in policy is the arrival of 10,000 North Korean troops in Russia, who are expected to fight alongside Russians to regain land in the Kursk region.

It is perhaps on the diplomatic front that ATACMS will make the largest impact.

ABC News’ Patrick Reevell and Luis Martinez discuss President Joe Biden’s potential decision to allow the use of longer-range U.S. missiles in Russia.

President Joe Biden has lifted Ukranian restrictions of U.S. weapons systems to utilize in an attack on Russia.  

Russia launched a major missile and drone attack on Ukraine overnight into Sunday targeting power plants and energy infrastructure across the country.

Ukrainian President Volodymyr Zelenskyy says Russia fired around 120 missiles, the largest attack on Ukraine since late August.

Patrick Reevell delivers the latest on the war in Ukraine including overnight drone attacks and recent statements from President Zelensky.

Japan’s foreign minister has arrived in Kyiv to discuss North Korea’s deepening military alliance with Russia, including the deployment of thousands of troops to support Moscow’s war in Ukraine

The Ukrainian leader told media that the war will end faster with Trump in office.

Ukrainian President Volodymyr Zelenskyy said that the war would end faster under the Trump administration but added that it must be a just peace.

Some Ukrainian officials, commanders, soldiers and commentators have said they were relieved by Trump's election, seeing as at least a chance to end the war.

Russia increased the intensity of its long-range drone attacks on Ukrainian cities by around 44% in the week following President-elect Donald Trump’s election victory.

U.S. Secretary of State Antony Blinken says the Biden administration is determined in its final months to help Ukraine keep fighting its war with Russia next year

ABC News’ Patrick Reevell reports on the Biden administration’s pledge to help Ukraine keep fighting its war with Russia next year.

Ukrainian President Volodymyr Zelenskyy confirmed 50,000 troops are preparing to fight to drive Ukraine from the border area of Russia it controls.

Some 50,000 Russian and North Korean troops are preparing a new counteroffensive in Russia’s western Kursk region, multiple Ukrainian military sources told ABC News.

ABC News’ Ian Pannell reports on Russia preparing for a new offensive against Ukrainian forces.

Some 50,000 Russian and North Korean troops are preparing a new counteroffensive in Russia’s western Kursk region, multiple Ukrainian military sources told ABC News.

Officials say Russian glide bombs, drones and a ballistic missile have smashed into cities in southern and eastern Ukraine, killing at least six civilians and injuring about 30 others

Russia's deputy foreign minister says Moscow is open to hearing President-elect Donald Trump’s proposals on ending the war in Ukraine

Officials say Russian missiles, bombs and drones have battered three regions of Ukraine in targeted nighttime attacks

Ukrainian President Volodymyr Zelenskyy spoke with President-elect Donald Trump, as the former seeks to shore up long-term American military and financial support in its war with Russia.

NATO confirmed on Monday that North Korean troops had been deployed to fight alongside Russian troops in the Kursk region.

ABC News’ Patrick Reevell talks about what the escalation of troops by North Korea and Russia could mean in Ukraine, as well as in Asia.

Rep. Victoria Spartz, R-Ind., says “peace can only be achieved through strength,” and former President Donald Trump is “the toughest in actions.”

Russia struck a nine-story building in Kharkiv, Ukraine, with a guided aerial bomb, Ukrainian President Volodymyr Zelenskyy said.

NATO confirmed on Monday that North Korean troops had been deployed to fight alongside Russian troops in the Kursk region.

ABC News’ Ian Pannell reports on the latest deployment in the Kursk region, the area within Russia where Ukraine has been waging an assault.

It’s been nearly 1,000 days since Russia invaded Ukraine and ABC News’ Ian Pannell reports on the lives caught in the middle now that North Korea intends to send their troops into battle.

Defense Secretary Lloyd Austin confirmed that the U.S. has evidence that North Korean troops are in Russia.

ABC News’ Patrick Reevell reports on the troop movement which the defense secretary calls a “very, very serious issue.”

ABC News' Britt Clennett reports on this potential threat and the response from the U.S.

Austin's visit is his third to the country during its war with Russia. ABC News' Britt Clennett reports.

Defense Secretary Lloyd Austin arrived in Kyiv, Ukraine, early on Monday morning for his third visit to the country since Russia's full-scale invasion began in 2022.

Geolocated video circulating online appears to show North Korean soldiers in Russia's far east, potentially to deploy to the war in Ukraine. ABC News' Ines de La Cuetara reports.

Zelenskyy told Ukraine's parliament in Kyiv the plan could finish the war against Russia next year.

At Gen.Ukrainian, children who have lost family to Russia's war in Ukraine meet with psychologists and attend group classes.