According to the Kiel Institute, which monitors military, financial, and humanitarian aid promised and delivered to Ukraine since the beginning of the Russian invasion, allies of Kyiv provided €36 billion in military support in 2025 - a 14% decrease from the €41.1 billion allocated in prior years. The military support in 2025 fell to levels even lower than in 2022 when the full-scale invasion had not yet begun. The decrease is attributed to a complete halt of US military support following President Donald Trump's return to office in early 2025 for a second term.

During the period from 2022 to 2024, Washington provided approximately half of all military aid to Ukraine. In response to the US cuts, European nations made significant efforts to fill this gap, increasing their overall funding by 67% in 2025 compared to the average from 2022 to 2024. Nonetheless, the institute noted that the cuts from the US could have caused even greater harm without the increased contributions from European countries, which underscores the ongoing reliance of Ukraine on its international supporters for military strength.

There are also growing disparities among European supporters, particularly between Northern and Western European nations and their contributions, which raises concerns about the stability and consistency of Ukraine's support network in the face of changing geopolitical dynamics. As the situation evolves, the impact of these funding cuts and shifts in support may affect not just Ukraine's military capabilities but also its long-term resilience in the conflict with Russia.