[1] Originally formed in 1775 entirely from local volunteers, the force would eventually integrate military discipline and training while also adjusting its methods and organization to match changes in Brazilian law.

The PMMG's primary mission is to deter and control crime throughout the state, often by patrolling streets or public facilities in cities, such as schools.

However, it is also responsible for monitoring the open lands, forests, rivers, and highways of Minas Gerais, and will even carry out reconnaissance missions, referred to as P2.

At least as concerned about collecting taxes on the newfound mineral wealth as stopping the lawlessness, Governor Pedro Miguel de Almeida requested two companies of Portuguese dragoons from the King [who?]

The people of Minas Gerais wanted a capable and loyal force to maintain order and punish wrongdoers, but not a heavy-handed unit focused on imposing Portuguese regulations.

As a result, on June 9, 1775 the governor[specify], Don Antonio de Noronha, would officially disband the Portuguese dragoons and replace them with the Regular Cavalry Regiment of Mines.