How many of the thirteen states needed to approve a law above a law before it could be passed under the articles of confederation

How was classical persia's extensive network of roads important to its civilization?

Which of the following was a goal of european conservation in the early 1800

At the casablanca conference, allied leaders signed an agreement to share military technology decided to launch an invasion of southern france agreed to accept only the unconditional surrender of the axis powers agreed to form a scientific team to create the atomic bomb