Denmark launched its presidency of the European Union on Thursday with a call for Europe to unite to take on war in Ukraine and chaos caused by U.S. President Donald Trump's global tariff hike which are likely to mark the Nordic country's six-month term at the helm of the world's biggest trading bloc.

Ukrainian President Volodymyr Zelenskyy is in Denmark as the Nordic country launches its European Union presidency. Zelenskyy flew into the western city of Aarhus on Thursday. A Ukrainian flag

The U.S. move affects high-demand munitions, including Patriot missiles, the AIM-7 Sparrow air-to-air missile and shorter-range Stinger missiles.

Analysts say Ukraine’s European allies can fill some of the gaps and provide artillery systems. But they don’t possess alternatives to the U.S.-made HIMARS missiles and air defense systems, especially Patriots, which are crucial to help defend Ukrainian cities.

Ukrainian authorities are enlisting European help to increase domestic military production as the United States pauses some weapons shipments to Ukraine