Boosting Europe’s defence capabilities after years of underinvestment is a goal broadly shared by leaders across the European Union – but how and to what extent are still big questions, depending on both the positions of the different political families and the countries they represent. “There are many challenges ahead as we move towards a European Defence Union, [but] the main one will be to overcome the national industry mentality and recognise that we need to make a joint effort to fill capability gaps,” Marie-Agnes Strack Zimmerman (Germany/Renew Europe), who chairs the Security and Defenc…