In 395 AD, Rome split into two empires - the Western Roman Empire and the Eastern Roman Empire. Each side had a ruler in charge of it. The Roman Empire was split by Theodosius.
The First Geneva Convention (1864) is one of the earliest formulations of international law. International law is the set of rules generally regarded and accepted as binding in relations between states and between nations. It serves as a framework for the practice of stable and organized international relations.
The best single exposition of traditional public international law was James Brierlyâs The Law of Nations: an introduction to the international law of peace (Oxford University Press, 1963). While it is dated, it is short and well written. The Diamond Law Libraryâs copies are at JX2000 B76L4 1963, on the second floor. A new work, Vaughn Lowe's International Law, has been written to be a conscious successor to Brierly as a concise introduction to the field. It is found on the fourth floor at KZ1242 .L69 2007.