Who dictates border controls in Eastern Turkey?

The European Union’s efforts to manage migration increasingly focus on countries in its neighbourhood and their borders. This approach is celebrated by EU policy makers for humanitarian achievements and successful border controls. However, these migration policies intervene in the often complicated local contexts of pre-existing armed conflicts and authoritarianism in third countries, which are paid only little attention in international migration negotiations. This raises the questions: how does the local context of specific borders matter in migration management and why must it be discussed in external migration negotiations?