In the current economic and strategic context, Europe is obliged to seek solutions to strengthen and develop its military capabilities through cooperation. Cooperation has become more of a necessity than an option. Even the most powerful European states are no longer able to have all the equipment and weapons systems necessary for high-intensity crisis management operations. Solutions are sought through cooperation, for example between France and the United Kingdom, and between the Nordic countries. Cooperation in the framework of the European Defence Agency and bilateral or sub-regional cooperation seem to be relevant and effective solutions, but what impact do they have in advancing European defence as a whole? The preconditions for capability cooperation are political will, financial means and a strong European industrial base. Moreover, a shift in thinking from national sovereignty reflexes to defence cooperation is needed, further encouraged by financial austerity.