The development of war by the use of Alexander the Great was divided into two East and West Empires, politically mapped to each other but not religious, it created a Roman Empire that is too big to manage like a man. The Byzantine Empire in the eastern part of Rome established the capital in Constantinople founded by Constantin in 330 AD, and the Orthodox church cut off contact with the Roman Church. There is a huge wall around the capital city of the Byzantine Empire that tries to hire any attack and hire a born barbaric mercenary to protect the border of the East Empire.
Results of various processes of political, economic, social and cultural. An important political process was decided to establish secular political power in the form of a national state, with the concept of war development, sovereignty and justification as an important support for this form. Closely linked to these economic processes is the emergence of monetized exchange economies characterized by economic processes, particularly large-scale production of goods and consumption and capital accumulation. Social processes include the decline of traditional social strata and the replacement of dynamic class and gender relations. Finally important is the emergence of secular, materialistic culture and related individualism and rationalism knowledge, which constitutes an important aspect of enlightenment 24.
The medieval war was a medieval European war. Technical, cultural, and social development dramatically changed the characteristics of war from ancient times, changed military tactics, and changed the role of cavalry and artillery (see military history). In the fortress, the Middle Ages saw the emergence of the European castle and then spread to West Asia. Publius Flavius Vegetius Renatus probably wrote De re militari on military issues in the second half of the 4th century. Historian Walter Goffart expresses it as "the entire Bible of medieval war" and De re militari is widely distributed throughout West Latin America. Western Europe relies on a single text as the basis of its military knowledge, but the Byzantine Empire in Southeastern Europe has a chain of military writers.