From the UN Department of Peacekeeping Operations to the NATO International Staff and the European External Action Service, international bureaucrats make decisions that affect life and death. In carrying out their functions, these officials not only facilitate the work of the member states, but also pursue their own distinct agendas. This book analyzes how states seek to control secretariats when it comes to military operations by international organizations. It introduces an innovative theoretical framework that identifies different types of control mechanisms. The book presents six empirical chapters on the UN, NATO, and EU secretariats. It provides new data from a unique dataset and in-depth interviews. It shows that member states emplo...