NATO Defence Ministers had a meeting with the European Union’s Foreign Policy Chief Federica Mogherini to discuss collaborating more closely on facilitating the movement of military personnel and equipment in Europe.

The meeting took place two months after the European Union announced its ‘action plan on military mobility’, which NATO sees as vital in the event of a conflict with Russia to overcome border delays and bridges too weak for tanks.

NATO has complained of conflicting regulations across the 28 EU countries and few special allowances for transfers of U.S. Troops that make it difficult for the alliance to deploy its missions and react quickly when challenges arise.

NATO Secretary-General Jens Stoltenberg said that a cooperation declaration with the EU would be signed next month at a summit with NATO countries leaders.