For two empires, this was contested ground. Long before Bagé was a city, the nearby Fort Santa Tecla changed hands between Spanish and Portuguese forces - sacked in 1776 when Rafael Pinto Bandeira drove the Spanish out, reoccupied after the First Treaty of San Ildefonso in 1777, abandoned and demolished by 1801. Even after borders were drawn, the wars kept coming. Carlos de Alvear invaded from Uruguay in 1825; General Juan Antonio Lavalleja's forces took the town in 1827. Peace arrived in 1828 only when Brazil accepted Uruguay's independence in exchange for keeping borderlands that Spain and Portugal had fought over for generations. To live in Bagé was to live where the map itself refused to settle.

By 1835 the enemy was no longer foreign. The Farroupilha Revolution pitted gaucho republicans against the Brazilian monarchy, and Bagé again became a theater of battle and pillage. Nearby, at the Battle of Seival, republican forces under Antônio de Souza Netto won a victory that led him to proclaim the Riograndense Republic - a breakaway nation born on these plains. War returned in 1893 when federalists rose against the republicans, bringing sieges and slaughter to the region. The honest record includes its horrors: at Rio Negro, 300 prisoners had their throats cut, and combat reached the very center of Bagé during the siege. These were not abstract campaigns but bloody reckonings, fought house to house among people who had to go on living here afterward.

Then the wars receded, and Bagé reached for the future faster than anywhere else in the state. The first railroad arrived in 1884 with the completion of the line to Rio Grande. In 1899, Bagé became the first city in Rio Grande do Sul to have electric lighting - a genuine mark of progress in a region only recently soaked in conflict. A piped water system followed in 1913. After a century as a battlefield, the Queen of the Frontier remade herself as a place of cattle and commerce, a producer of sheep, cows, and horses on the open campanha, with the coal of nearby Candiota promising an industrial age to come.

The city keeps its long, contested past close at hand. The Dom Diogo de Souza Museum, opened in September 1956 and named for the governor whose stalled march founded the town, holds historic currency, religious artifacts, old documents, and a collection of nearly 100,000 photographs - a vast visual archive of a borderland's memory, drawing more than 8,000 visitors a year. Bagé's gaucho identity still shapes daily life across the surrounding campanha, where ranching remains the rhythm of the land. Uruguay keeps a consulate in the city, a quiet acknowledgment that here, on the frontier, the two nations have never been far apart - sometimes at war, more often simply neighbors across an open plain.