On November 22, 1910, Rio de Janeiro was convulsed by the four-day Revolta da Chibata (Revolt of the Lash). Approximately half of the predominantly Afro-Brazilian sailors stationed in the nation’s capital—likely fifteen hundred to two thousand men—seized four modern battleships, removed their officers, and besieged the city. They complained of mistreatment, forced recruitment, low pay, and meager food, but their only demand in their first communication to the president was the cessation of corporal punishment in the Brazilian navy. Three of the four ships seized had been recently obtained by the Brazilian government from British shipyards; two were the first all-big-gun dreadnought-class battleships ever sold by the British to any foreign navy. Their 12-inch guns could near-simultaneously launch twelve 850-pound explosive shells at targets miles away, meaning that should they fire almost every part of the Brazilian capital city was under threat. Their second communique to the president demanded an end to the “slavery as practiced in the Brazilian navy.” The institution’s nearly century-long traditions of forced conscription, systematic and ritualized lashing, long-term forced labor, and the conspicuous malnourishment of Afro-Brazilian men tempts comparison to the exploitation of the enslaved in preabolition Brazil, but other than a brief policy of purchase and subsequent freeing of enslaved men to serve in the armed forces during the Paraguayan War (1864–1870), naval service did not draw on the exploitation of the enslaved. Instead, it conscripted Brazil’s free Afro-descendant population; citizens who represented a 47 percent plurality of Brazil’s population, larger than either the free white or enslaved Black populations at the time of Brazil’s first national census in 1872. The Brazilian navy was just one part in a series of institutions and legislative controls created and used to control Brazil’s free Afro-Brazilian population both before and after abolition in 1888. The freedom and citizenship of free Black men, women, and children was often ephemeral and regulated. Although Brazil lacked institutionalized racial segregation such as apartheid or Jim Crow, controls such as restriction on land ownership, police policies, military conscription, the manipulation of orphans, forced apprenticeship, and incarceration were implemented in such racialized ways that the overall outcome for Afro-Brazilians was similar. The navy’s acquisition of cutting-edge weapons of war created an opportunity for powerless Afro-descendant men to challenge the generally unacknowledged state systems of racial oppression and hierarchy.