In 2015, von der Leyen argued that a form of EU army should be a long-term goal. She also said that she was convinced about the goal of a combined military force, just as she was convinced that "perhaps not my children, but then my grandchildren will experience a United States of Europe". In March 2015, she and her counterparts from France and Poland, Jean-Yves Le Drian and Tomasz Siemoniak, revived a meeting format intended to promote co-operation between the three countries in crisis zones by holding their first meeting between the Weimar Triangle defence ministers since 2007.