When Russia invaded Ukraine in February 2022, Ukraine’s military was largely reliant on Soviet-era weaponry, from tanks to artillery to fighter jets. While that arsenal helped Ukraine fend off an assault on the capital of Kyiv and prevent a total rout in the early weeks of the war, billions of dollars in military assistance has since poured into the country, including more modern Western-made weapons. Ukraine’s counteroffensive, now in its early stages, could offer a glimpse of whether and to what extent the newer weapons systems have strengthened Kyiv’s ability to stand up to Russia. Analysts are cautiously optimistic. “Ukraine…