The suspension of U.S. military aid to Ukraine by the Trump administration doesn’t mean Ukraine’s defenses will quickly collapse. But it's a major blow that threatens to remove some of the most formidable weapons in Ukraine’s battlefield arsenal, and ratchets up pressure on Kyiv to accept a peace agreement. Ukraine depends heavily on foreign help to hold back Russia's full-scale invasion, particularly on the U.S.-made Patriot air defense systems and long range missile systems. The American-supplied Patriot systems are crucial to defending cities like Kyiv from Russian air attacks, without them the civilian infrastructure would be exposed to Russian missile attacks. Some analysts also say that on the frontline, the pause in U.S. aid means Russia would be able to make more gains on the ground and it would make it harder for Ukrainian troops to defend their positions. American military assistance also goes far beyond weapons and ammunition. Ukrainian troops rely on satellite communications systems supplied by Elon Musk’s Starlink to communicate on the front line, and on American intelligence to track Russian troop movements and select targets for Ukrainian strikes. If the U.S. stops sharing data from satellites and other assets, it would badly affect Ukraine’s capability to strike back at Russia, and Ukraine’s other allies lack the resources to fill the gap. AP video shot by Vasilisa Stepanenko