Emperor Justinian reconquered many former territories of the Western Roman Empire, including Italy, Dalmatia, Africa, and southern Hispania.
A lot of things did, in various places around the world. The events that jump out in my mind when those dates are mentioned are these:
<u>May 14th, 1948:</u>
The provisional government of the portion of the British Mandate for Palestine that was designated by the UN partition as reserved for Jewish administration declared that it was becoming a free and independent sovereign nation called Israel.
<u>May 15th, 1948:</u>
The massed armies of Syria, Egypt, Jordan, and Iraq rolled into Israel with big signs on the front of their tanks that read "Oh No You're Not !" .
Answer:
Keeps the government more balanced and keeping the president from having too much power. Decisions are made by senate and the house of representative which is made up of a lot of people so the best decisions are made. The main purpose is to limit the power of the government and provide more power to the people.