Soon after Russia began its major offensive on Ukraine last February, the EU made the historic decision to use money from a relatively new fund, known as the European Peace Facility, to back Kyiv. It was the first time it had been used to supply lethal weapons to a third country.

Since then, the EU has committed some €3.6 billion in collective funds to the Ukrainian military, which pays for a combination of lethal and non-lethal aid. Contributions to the European Peace Facility are calculated according to each country’s economic output. As a result, Germany, which has the largest GDP in the bloc, contributes the most.

The EPF can also be used to reimburse member states for aid they have individually sent to Ukraine. For example, Poland — one of Ukraine’s biggest military backers — has indicated it will seek EU funds to cover the cost of Leopard 2 tanks Warsaw wants to send to Kyiv.