The Munich Agreement was an agreement between France, Italy, Germany and Britain. After Germany threatened an invasion of the Sudetenland in Czechoslovakia, the British and the French prime ministers tried to get Adolf Hitler to agree not to use his military in the future in return for taking the land. After Hitler had agreed, most people thought that the agreement was a success, but Germany invaded the rest of Czechoslovakia in 1939. Later that year, the Second World War started after Germany invaded Poland.