The evolving war in Ukraine will present difficult new tests in 2023 for the self-imposed red lines Western nations have placed on the weapons they provide to the country.
The bar might be harder to cross as the war grinds on, however as advanced fighter planes like American-made F-16s, U.S. and German-made tanks, and drones on the Ukrainian wish list await more difficult decisions in Western capitals about how much high-end equipment they can — or want to — send in the...