Ukraine’s partners, led by the United States and spread over the globe, have increasingly responded to Russia’s full-scale invasion of February 2022 with a dizzying array of financial, humanitarian, and military assistance. Unfortunately, the way in which the U.S. and Ukraine’s other partners have provided military assistance over the last year — that is, by delivering a wide range of equipment, ammunition, and training — significantly undermines the longer-term objective of developing a sustainable system via which Ukraine can generate combat power in the coming years to overcome Russian aggression.