Final answer:
Throughout history, various parties were not invited to peace agreements due to political disagreements or the desire to maintain sovereignty. For example, the U.S. Senate did not join the League of Nations, and Czechoslovakia was not invited to the Munich Conference.
Step-by-step explanation:
The question refers to the different peace agreements throughout history where certain parties were not invited or chose not to participate. For instance, the United States and the South Vietnamese government were not bound by the accords during the Vietnam War era. At the end of World War I, President Wilson proposed the League of Nations in the Treaty of Versailles, which the U.S. Senate rejected, fearing a loss of sovereignty. The Republicans and conservative Democrats opposed joining the League. Again during the Munich Conference in 1938, Czechoslovakia was notably not invited when its Sudetenland region was being discussed for annexation by Germany. These exclusions and rejections were often due to concerns over national sovereignty, security, and political disagreements.