<span>The US is a mixed economy, with mostly free market features. There are some command economy features, such as a public military, public police forces, public roads, etc</span>
Charlemagne's crowning made the Byzantine Emperor redundant, and relations between the East and the West deteriorated until a formal split occurred in 1054. The Eastern Church became the Greek Orthodox Church by severing all ties with Rome and the Roman Catholic Church — from the pope to the Holy Roman Emperor on down.
The Aztec tribute and tax system was a strong system of laws that was the main source of income of the Aztec Empire. The conquered regions paid tributeand the citizens paid taxes (with the exception of priests, nobles, minors, orphans, invalids, and beggars).
The reason why tributes were so important, was because it was a major source of income for them. They relied on it to support their huge empire and population.
