Russian President Vladimir Putin's "special military operation" into neighboring Ukraine began on Feb. 24, with Russian forces invading from Belarus, to the north, and Russia, to the east. Ukrainian troops have offered "stiff resistance," according to U.S. officials.
The Russian military has since launched a full-scale ground offensive in eastern Ukraine's disputed Donbas region, capturing the strategic port city of Mariupol and securing a coastal corridor to the Moscow-annexed Crimean Peninsula.
A look at the two leaders at the center of the war in Ukraine and how they both rose to power, the difference in their leadership and what led to this moment in history.
Here's how the news is developing. All times Eastern.
May 20, 2022, 5:00 PM EDT
More than 40 countries to take part in next Ukraine Contact Group meeting
More than 40 countries will be represented at the second meeting of the Ukraine Contact Group, formed last month to coordinate international support for Ukraine, according to Pentagon press secretary John Kirby.
Monday's meeting "will allow us to continue to dip into a process to get Ukraine, or at least to make other nations available and knowledgeable about what Ukraine needs as the fight is ongoing," Kirby told reporters during a briefing Friday.
More than 40 nations attended the first meeting both virtually and in-person at Ramstein Air Base in Germany. New countries will attend the second, which will be strictly virtual, Kirby said.
"There are some countries that have shown an interest in participating that weren't in the first meeting," said Kirby, who called the first iteration "a true global community" of countries in NATO and beyond.
-ABC News' Matt Seyler
May 20, 2022, 3:41 PM EDT
Russian Ministry of Defense claims it has taken complete control over Azovstal steel plant, Mariupol
Russia's Ministry of Defense claimed Friday it has taken complete control of the Azovstal plant and Mariupol from the Ukrainian forces, expelling them from the port city.
The underground facilities of the plant, in which the Azov National Regiment militia were hiding, came under the complete control of Russian forces, the ministry claimed.
The commander of the Azov Regiment was reportedly taken out of the territory of the plant in an armored car, the ministry said.
Russia claims 2,439 Ukrainian servicemen have laid down their arms and surrendered since May 16.
-ABC News' Alexandra Faul
May 20, 2022, 1:10 PM EDT
Russia to cut off Finland's natural gas Saturday morning
Gasum, Finland's natural gas company, announced Friday that it was informed its imports from Russia's Gazprom Export will be cut off on Saturday at 7 a.m. local time.
The move by Russia comes days after Finland submitted its application to join NATO.
“It is highly regrettable that natural gas supplies under our supply contract will now be halted. However, we have been carefully preparing for this situation and provided that there will be no disruptions in the gas transmission network, we will be able to supply all our customers with gas in the coming months,” Gasum CEO Mika Wiljanen said in a statement.
Gasum will supply natural gas to its customers from other sources though the Balticconnector pipeline, which connects Finland with Estonia, the company said in a statement.
Gasum said its gas-filling stations in the network area will continue in normal operation.
-ABC News' Alexandra Faul
May 20, 2022, 8:57 AM EDT
US-supplied howitzers to Ukraine lack accuracy-aiding computers
The M777 155mm howitzers are now being used by the Ukrainian military in its war with Russia.
The Pentagon did not deny that the artillery pieces were supplied without the computers but said it had received "positive feedback" from the Ukrainians about the "precise and highly effective" weapons.
U.S. Marine Corps M777 towed 155 mm howitzers are staged on the flight line prior to being loaded onto a U.S. Air Force C-17 Globemaster III aircraft bound for Europe for delivery to Ukrainian forces, at March Air Reserve Base, Calif., April 22, 2022.
U.S. Marine Corps/Cpl. Austin Fraley/Handout via Reuters
That positive sentiment was echoed by a Ukrainian politician, who spoke to ABC News on condition of anonymity. However, the politician also expressed frustration that the artillery pieces had not been the fitted with the digital computer systems.
Artillery is currently playing a crucial role in the fighting across eastern Ukraine, as Russia continues its offensive in that part of the country. U.S. officials recently confirmed that all but one of the 90 howitzers promised to Ukraine had now been delivered, along with tactical vehicles used to tow them.
U.S. Marine Corps M777 towed 155 mm howitzers are staged prior to being loaded onto a U.S. Air Force C-17 Globemaster III aircraft bound for Europe for delivery to Ukrainian forces, at March Air Reserve Base, Calif., April 22, 2022.
U.S. Marine Corps/Cpl. Austin Fraley/Handout via Reuters
If fitted to a howitzer, the digital computer system enables the crew operating the weapon to quickly and accurately pinpoint a target. Howitzers without a computer system can still be fired accurately, using traditional methods to calculate the angle needed to hit a target.
Modern computer systems, however, rule out the possibility of human error. Why the artillery pieces supplied to Ukraine did not have the digital targeting technology installed is unclear. The Pentagon said it would not discuss individual components "for operational security reasons."
