Abstract
This article will analyse the challenges facing CSDP through an evaluation of the impact that differing member state strategic cultures have on the EU Battlegroup Concept,, highlighted through the examples of Germany and Poland. The concept was initiated to give the EU an increased rapid reaction capacity. However, as emphasised through the cases of Germany and Poland, divergences in EU member states’ strategic cultures remain, including when, where and how force is used. When this is combined with the cost of plugging military capabilities’ gaps, the political willingness to deploy a Battlegroup can be affected. Whilst the article highlights that the role that member states want to play within CSDP as well as international expectations can override constraining factors, the Battlegroups rely on a rotation system. As some member states are more willing to deploy the Battlegroups than others, the concept risks becoming a declaratory policy thus undermining CSDP.