In planning the revolution, Bonifacio contacted Rizal for his full-fledged support for the Katipunan in exchange for a promise to rescue Rizal from his detention. In May 1896, the leadership of the Katipunan met with the Captain of a visiting Japanese warship in an attempt to secure a source of arms for the revolution, but without success. The Katipunan's existence was revealed to the Spanish authorities. Days after the Spanish authorities learned of the existence of the secret society, in August 1896, Bonifacio and his men tore up their "cédulas" during the Cry of Balintawak that started the Philippine Revolution of 1896.