CSDP missions sit within the wider context of international law, multilateral humanitarian coordination, national and international industry, national and local government actors and other EU tools and actors. Each EU civilian CSDP mission works with a huge number of partners every day, not just at a national level but with international partners and coalitions, and quite often particularly in the maritime context with affected industry. Based on the previous research, and drafted with the insights of Mr Chris Reynolds, former Head of Mission in EU capability building mission in Somalia, this chapter presents progressive categories of relationship identified and associated with the implementation of the Integrated Approach, and subsequent fulfilment of the missions given and sometimes fluid mandate. This is important because it helps to define relationships, dependencies and categorise communications. It facilitates political prioritisation and subsequent allocation of resources. It also points to a mindset among international actors that appreciate the need for cooperation, but are reluctant to cede independence, power and profile, leading to a level of ‘coopetition’ among actors.