code-named "Centro Bravo" and headed by Manuel Rojas. "Centro Bravo" was the main center of operations and was located in the Rojas plantation of El Triunfo. Manuel Rojas was named "Commander of the Liberation Army" by Betances. Mariana Bracetti (sister-in-law of Manuel) was named "Leader of the Lares Revolutionary Council." Upon the request of Betances, Bracetti knitted the first flag of Puerto Rico also known as the revolutionary Flag of Lares (Bandera de Lares). The Spanish authorities discovered the plot and were able to confiscate Betances's armed ship before it arrived in Puerto Rico. The Mayor of the town of Camuy, Manuel González (leader of that town's revolutionary cell), was arrested and charged with treason. He learned that the Spanish Army was aware of the independence plot, and escaped to warn Manuel Rojas. Alerted, the revolutionists decided to start the revolution as soon as possible, and set the date for September 28, 1868. Mathias Brugman and his men joined with Manuel Rojas's men and with about 800 men and women, marched on and took the town of Lares. This was to be known as "Grito de Lares" (The Cry of Lares) The revolutionists entered the town's church and placed Mariana Bracetti's revolutionary flag on the High Altar as a sign that the revolution had begun. They declared Puerto Rico to be the "Republic of Puerto Rico" and named Francisco Ramírez its President. Manuel and his poorly armed followers proceeded to march on to the town of San Sebastián, armed only with clubs and machetes. The Spanish Army had been forewarned, and awaited with superior firepower. The revolutionists were met with deadly fire. The revolt failed, many revolutionists were killed, and at least 475, including Manuel Rojas and Mariana Bracetti, were imprisoned in the jail of Arecibo and sentenced to death. Others fled and went into hiding. Mathias Brugman was hiding in a local farm where he was betrayed by a farmer named Francisco Quiñones; he was captured and executed on the spot. In 1869, fearing another revolt, the Spanish Crown disbanded the Puerto Rican Militia, which had been composed almost entirely of native-born Puerto Ricans, and also the Compañia de Artilleros Morenos de Cangrejos, a separate company of black Puerto Ricans. They then organized the Volunteer Institute, composed entirely of Spaniards and their sons. Intentona de Yauco Leaders of El Grito de Lares who were in exile in New York