They had largely achieved objectives dating back to 1812–1816, when a number of breeders moved from Minas Gerais (where the breed originated) to São Paulo.

[2] They had introduced bloodlines from several non-gaited horse breeds, including the (Arabian, Anglo-Arabian, Thoroughbred, Lusitano and the American Saddlebred.

These crosses were intended to adapt the Mangalarga to the local topography, with a minimal loss of gait smoothness.

A group of breeders who disagreed with this decision met in 1948 and founded the Association Mangalarga Marchador, which became the ABCCMM.

Carneiro, a veterinarian and zoologist, was a friend and neighbor of the governor of Minas Gerais and future Brazilian president Juscelino Kubitschek and helped found a new breed association to preserve the original Marchador horse.

The breeders met in Caxambu (where a Mangalarga Marchador museum is located);[2] among those present were Joaquim Fernandes Braga (superintendent of the Minas Gerais Animal Production Department and Secretary of Agriculture, Industry, Trade and Labor) and personnel from the federal Ministry of Agriculture.

In North America, the Mangalarga Marchador breed association is the [http://www.namarchador.org USMMA, a nucleo of the ABCCMM.

The Mangalarga Marchador is a medium-sized breed with a silky coat, prominent withers, deep chest, a proportionately-long back, muscular hindquarters, a sloping croup and hard hoofs.