The colour green represents the province's fields; the blue refers to its rivers, the sea at its coasts and the sky over it.

The Confederation had no central government, and the governor of Buenos Aires was responsible for conducting foreign policy, at that time this office was held by federalist Juan Manuel de Rosas.

This design was originally used on warships during the campaigns of 1841-1845, but was flown at Fuerte de Buenos Aires between 1841 and 3 February 1852.

[2] On 11 September 1852, the Unitarian Party carried out a bloodless coup in the province, which led to the creation of the State of Buenos Aires.

The State of Buenos Aires used a flag consisting of two light blue stripes and a white one in the middle, where the Greater Coat of Arms of Argentina was located.