Ukraine got permission from its allies last month to strike military targets in Russia with weapons they'd supplied, reversing a long-held restriction. AdvertisementEven so, Ukraine appears to have used HIMARS to strike targets in Russia since the restrictions were lifted. Related storiesRussia has also been stationing troops close to the border with Ukraine, ready to be called in to fight. Ukraine's deputy defense minister, Ivan Havryliuk, told the AP that at least 90,000 Russian troops deep in Russian territory were readying for a new assault when the restrictions were lifted. AdvertisementExperts say this new reality has had a big impact there, particularly given the Russian border is so close to the fighting.

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Persons: —, Hefastus, Ivan Havryliuk, Ukraine's, George Barros, They've Organizations: Service, Associated Press, Business, Artillery, System, AP, Washington Locations: Ukraine, Russia, Ukrainian, Kharkiv, Russian