First siege of Porto Alegre

First siege of Porto Alegre
	Part of the Ragamuffin War
	; A map of Porto Alegre in 1839, showing the trench lines around the city
Date	27 June 1836 – 18 September 1836
Location	Porto Alegre, Rio Grande do Sul, Empire of Brazil
Result	Imperial victory
Belligerents
Ragamuffin rebels	Empire of Brazil
Commanders and leaders
Bento Gonçalves	Manuel Marques de Sousa; Bento Manuel Ribeiro
Strength
3,000 men; 1 brig; 1 patache; 1 schooner; 1 yacht	1,000 men
Casualties and losses
Unknown	Unknown

The first siege of Porto Alegre was a siege carried out by rebel forces during the Ragamuffin War in southern Brazil between late June and September of 1836. Porto Alegre, the capital of Rio Grande do Sul, had fallen to rebel forces in September 1835, been retaken in a loyalist mutiny in June 15th of 1836, and a few weeks later assaulted and then besieged by a force commanded by the rebel leader, Bento Gonçalves.

Gonçalves was eventually forced to lift the siege after an attack by Imperial commander Bento Manuel Ribeiro's troops.