Macron, who has increasingly voiced his displeasure with the direction of the Trump administration's foreign policy-even threatening in September to not make any trade deals with the USA due to its abandonment of the Paris Climate Agreement-endorsed the pan-European military idea.
US President Donald Trump, who has expressed disdain for multilateral organizations, skipped the event.
While Putin's handshakes with Macron and Merkel were brief, he and Trump engaged in mutual arm and back patting.
It also underlined growing concerns over the reliability of USA security guarantees under Trump, and his wider commitment to a postwar global order the US was largely responsible for building and has benefited from, including economically.
"Ruining this hope with a fascination for withdrawal, violence or domination would be a mistake for which future generations would rightly find us responsible", he said.
"Nationalism is a betrayal of patriotism", he said. "They chose to do this at the G20 summit in Argentina", Peskov said.
"I would even describe it as very important", Netanyahu told reporters after the ceremony in Paris, adding that he also spoke there with U.S. President Donald Trump.
Upon shaking hands, Putin flashed Trump a quick thumbs up in a moment caught on video. The aim of the Paris Peace Forum is to establish a global platform to reaffirm the importance of multilateralism, worldwide cooperation and reformation of global governance institutions. And you know what? But nationalism has also been associated with movements that led to Word War I and Word War II, including Adolf Hitler and Nazism's German nationalism. "It says - in English or French - love of nation, devotion to your country. We have a lot of problems".
Right to Left: Russian President Vladimir Putin.
But Trump did not broach the divide as he paid tribute Sunday to US and allied soldiers killed in World War I during "a awful, terrible war" that marked America's emergence as a world power.
Afterwards, he planned to visit and deliver Veterans day remarks at the suresnes American cemetery and memorial outside Paris where more than 1,500 Americans who died during the war are buried.
A handful of senior administration officials, including White House Chief of Staff John Kelly, went in the president's place, while Trump remained behind at the ambassador's residence with no alternate schedule for hours.
In the four years of fighting, remembered for brutal trench warfare and the first use of gas, France, the British empire, Russian Federation and the United States had the main armies opposing a German-led coalition that also included the Austro-Hungarian and Ottoman empires.
After the ceremony, German Chancellor Angela Merkel and UN Secretary-General Antonio Guterres gave the opening speeches at the new peace forum in Paris, set up by Mr Macron.
President Trump snubbed the Peace Forum, instead visiting a military cemetery in the Paris suburbs, a day after coming under criticism for cancelling a similar trip due to rain.
On a weekend meant to commemorate world war veterans, U.S. President Donald Trump's moniker as a self-declared nationalist garnered worldwide attention on the 100th anniversary of the end of World War I.