French President Emmanuel Macron attends the commemoration ceremony for the 80th anniversary of the Allied Liberation of the eastern France city of Colmar at the end of World War II, in Colmar on Feb. 2. AFP-Yonhap

The European Union must show its muscle if US President Donald Trump makes good on his threat to target the bloc with tariffs, French President Emmanuel Macron warned on Monday.

"If we are attacked in terms of trade, Europe — as a true power — will have to stand up for itself and therefore react," Macron said as he arrived for leaders' talks in Brussels. (AFP)