Josep Borrell, the EU's top diplomat, visited a newly-established EU training mission for Ukrainian troops in Poland.
Borrell was speaking on Friday during a visit to a new EU training centre for Ukrainian soldiers in Brzeg, south-west Poland, where he talked to Polish instructors and Ukrainian soldiers.
He had come to Poland on Thursday to take part in the OSCE Ministerial Council in the central city of Lodz.
After visiting the training centre, Borrell told reporters he had promised Volodymyr Zelensky, the Ukrainian president, in April that the EU would organise training for Ukrainian troops.
He said he was humbled after talking to Ukrainian soldiers who had come to Poland to learn skills that would help them defend their homeland.
According to Borrell, the mission will cost European taxpayers EUR 100 million and train 50,000 Ukrainian soldiers. British and Canadian instructors will also be involved in the event, as well as EU personnel.
Norway will pay an additional EUR 50 million and the EU will purchase 60 million worth of weapons to be used in the training.