PARIS — France made an unprecedented demand today for its European Union allies to support its military action against the Islamic State group as it launched new airstrikes on the militants’ Syrian stronghold, days after attacks in Paris linked to the group killed at least 129 people.

France invoked a never-before-used article of the EU’s Lisbon Treaty obliging members of the 28-nation bloc to give “aid and assistance by all the means in their power” to a member country that is “the victim of armed aggression on its territory.”

French Defense Minister Jean-Yves Le Drian said EU partners could help “either by taking part in France’s operations in Syria or Iraq, or by easing the load or providing support for France in other operations.”

Arriving for talks in Brussels today with his EU counterparts, Greek Defense Minister Panagiotis Kammenos told reporters that “we’re in a new situation in Europe. This is Sept. 11 for Europe.”

French military spokesman Col. Gilles Jaron said the latest airstrikes in the Islamic State group’s de-facto capital of Raqqa destroyed a command post and training camp.

The Paris attacks Friday, claimed by IS, have galvanized international determination to confront the militants.

Hollande has said the victims came from at least 19 nations, and the international community, led by the U.S. and Russia, must overcome their deep-seated divisions over Syria to destroy IS on its home turf.

Authorities have yet to announce the capture of anyone suspected of direct involvement in the slaughter, though police have used emergency powers to conduct almost 300 searches since Sunday night that netted 127 arrests and 31 weapons.