The 1º Batalhão de Forças Especiais (1º B F Esp) (English: 1st Special Forces Battalion), also named António Dias Cardoso Battalion, is a special forces unit of the Brazilian Army.

[3] In 1991, elements of the 1st BFEsp along with participated in Operation Traira, an action taken by the Brazilian Army in response to an attack made in February by the Revolutionary Armed Forces of Colombia against a semi-permanent army position in the Taraíra River.

[4][5] During MINUSTAH, a force of around 20 men from the 1st Special Forces Battalion and 1st Commando Actions Battalion made up the Destacamento de Operações de Paz (Peace Operations Detachment) or Dopaz, a special operations unit responsible for high-risk missions such as special reconnaissance and direct action against leaderships of Haitian gangs, as well as leading the UN raids on neighborhoods such as Bel Air, Cité Militaire and Cité Soleil from 2005 to 2007.

[1] According to Brazilian SF General Sergio Schwingel, Dopaz's role in Haiti led to the UN creating a doctrine for the usage of special forces in peacekeeping operations worldwide.

The SF Battalion falls within the Army's Special Operations Command and is located in Goiânia.