Are there many countries with a pure command economic system or a pure market economic system

Command economy advantages include low levels of inequality and unemployment, and the common good replacing profit as the primary incentive of production. Command economy disadvantages include lack of competition and lack of efficiency.

Explanation:

although the crusades failed to capture jerusalem, they had several major impacts on western europe. they increased the authority of the king: sometimes nobles died in battle without leaving an heir in which case the king got their land. kings passed taxes to pay for the crusades.

they were all fought in the middle east during ww1