How could the United States' economy truly characterized?

The US economic system is primarily a market system. The US economy operates as a free market, meaning private businesses and individuals have substantial freedom to buy, sell, and produce in a competitive environment. But the US economy is also regulated to a limited extent by the government, which is a feature of a command economy. Therefore, the US technically has a mixed economy.

1500 B.C to 500 C.E :)