The Strategic Command of Ukraine's armed forces said on June 17 that its forces had damaged 15 Russian air defense systems in occupied Crimea since May.
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Russian S-300, S-350, and S-400 antiaircraft divisions have been affected, the Strategic Command said on social media. These missile divisions are capable of launching surface-to-air missiles.
Military experts have called the S-400 system one of the most advanced air defense systems in the world. Some estimate the production cost per S-400 system at $600 million per unit.
The system has been key to Russia's air defenses in Crimea, which it illegally occupied in 2014.
The Strategic Command also said dozens of launchers, more than 15 radar stations, and more than 10 control points had been destroyed in Crimea.
As Russian air defenses weaken, the Strategic Command said, "The day of the liberation of the Ukrainian Crimea is approaching."
The Strategic Command included a map in the post, which showed damaged divisions throughout Crimea. According to the map, the locations are Ai-Petri, Alushta, Belbek, Chornomorske, Dzhankoy, Donskoye, Yevpatoria, Misov, Saki, Sevastopol, and Tarkhankut. In some locations, multiple divisions have been damaged.
SEE ALSO: Interactive Map: Occupied, Militarized CrimeaUkraine hopes to improve its air defense capabilities, notably through the acquisition of F-16 fighter jets.
The Strategic Command post comes the same day NATO Secretary-General Jens Stoltenberg said the "path to peace is more weapons for Ukraine," ahead of the NATO summit in Washington in July.
SEE ALSO: NATO Chief: West Should 'Impose A Cost' On China For Its Support Of RussiaIn addition to military assistance, Group of Seven allies announced on June 12 that Ukraine will receive a $50 billion loan using the profits from Russian sovereign assets that have frozen in Europe.
White House National Security Council spokesman John Kirby said on June 17 that the loan will help repair Ukrainian infrastructure that has been damaged by Russia's aggression inside the country and to help them with reconstruction.
"It's a way to get that reconstruction started right now and have Russia literally and figuratively footing the bill," Kirby said.