This coursebook covers Paper 1, Prescribed Subject 1, Peacemaking, Peacekeeping – International Relations 1918–36, in the 20th Century World History syllabus for the IB History programme. The text is divided into clear sections following the IB syllabus structure and content specifications. It offers in-depth coverage of the subject as well as detailed study of a wide range of primary and secondary sources to develop students' analytical skills. It also provides plenty of exam practice including student answers with examiner's comments, simplified mark schemes and practical advice on approaching the document-based Paper 1 examination.