European Commission President Ursula von der Leyen, Germany s former Defence Secretary, is also a high-profile advocate of the concept of a continent-wide defence force.
Numerous events are tempting the EU to reform its treaty. This paper returns to this debate, reviewing recent institutional proposals and other contributions.
Poland and 12 other EU countries have come out against "unconsidered and premature attempts to launch a process towards the EU Treaty change," according to an unofficial document.