Donald Trump and France's Emmanuel Macron have both said Europe should pay more of its defence costs, a day after the US president attacked the idea of a European army.
Mr Trump is in Paris ahead of events marking the end of World War One.
He said the US wanted “a strong Europe,” but the defence bill “has been largely on the United States.”
Mr Macron said he agreed that “we need a much better burden-sharing within Nato” – the Euro-Atlantic alliance.
“When President Trump has to protect one of the states of the United States he doesn't ask France or Germany or another country to finance. That's why I do believe that we need more investments,” he said.
Around 70 world leaders are gathering in Paris for events marking the Armistice that ended World War One, which was signed 100 years ago this Sunday.
The Trump-Macron show of unity came despite earlier tensions, triggered when the French leader said the EU needed a joint army now that the US was pulling out of a key disarmament treaty with Russia.
“I want to build a real security dialogue with Russia,…