The answer is that the states had power to enforce national laws. The Articles of Confederation didn't have an executive branch established.
I believe that the Korean War started when the North Korean Communist army crossed the 38th Parallel and invaded non-Communist South Korea.
Prior to the printing press, there were only 30,000 copies of books in Europe and 75% of them were in Latin. The printing press made it possible to print more books in multiple languages which helped increase literacy and education throughout Europe because books were more accessible. The New Testament was also translated into German by Martin Luther. However, the Church did not like the printing press because it made it impossible for them to censor books. This means that authors were able to spread new ideas about science and religion which the Church did not agree with. While the spread of new ideas helped revolutionize society during the Renaissance, it created a lot of controversy with the Church.
