This thesis aims to reveal the nature of the European Union as a sender of sanctions compared with the United States. The question I ask is; is the European Union less united as sender of GSP-sanctions than the US, and what causes can explain this? The cases that are studied in the thesis are the European Union's GSP sanctions towards Belarus in 2006 and the US's GSP sanctions towards the same target in 2000. Building on a theoretical framework of how strategic actors use economic sanctions, I first look at economic, political, geographical and ethical factors of using GSP sanctions. I also look at the judicial and institutional framework for the use of such sanctions. In this way, I may describe the main differences between the US and EU a...