This document provides guidance for students on developing History Day projects focusing on debates and diplomacy for the 2010-2011 theme. It defines debate as a discussion involving opposing points that is more complex than a simple disagreement and must have historical significance. Diplomacy is defined as the art of conducting negotiations between entities, such as nations, to resolve issues or forge agreements. The document encourages students to choose topics where debate led to or followed from diplomacy, and provides examples of places to find relevant debates and diplomatic events throughout history.