Soldiers from colonies around the world fought in the war. Colonies became a source of manpower and raw materials. European colonies were not passive, while there was war in Europe, they were actively involved in the fight.
Historians get their information from two different kinds of sources: primary and secondary. <span>Primary sources </span><span>are first hand sources; </span>secondary sources<span> are second-hand sources. For example, suppose there had been a car accident. The description of the accident which a witness gives to the police is a primary source because it comes from someone actually there at the time. The story in the newspaper the next day is a secondary source because the reporter who wrote the story did not actually witness it. The reporter is presenting a way of understanding the accident or an </span>interpretation<span>..</span>
An advantage is that it takes way less time to do it than to create a formal treaty since the President would not need consent from the congress for an executive agreement. A formal treaty can, however, last longer because it is more difficult to cancel, so if it's good, then it is also safer for it to be formal.
