French President Emmanuel Macron has offered a rejection of nationalism in an Armistice Day speech watched on by US President Donald Trump.
Mr Trump has proudly identified as a nationalist as he pushes the 'America First' agenda.
"By saying 'our interests first and never mind the others' you stamp out the most precious thing a nation has – its moral values," Mr Macron said at an event in Paris marking the centenary of the World War One Armistice.
He added that pushing nationalism was a "betrayal of patriotism".
A short time ago, Mr Trump tweeted to thank Mr Macron for what he called a "beautiful ceremony" in the French capital.
Mr Trump did not refer to Mr Macron's remarks in his tweet.