Royalist forces under Morillo and Morales captured Cartagena and Bogotá in 1816. Before leaving for New Granada Morillo had decommissioned most of the irregular forces that had fought under Boves, except those that he took to New Granada. With little prospects, some "pardos" and "llaneros" began to join the rebellions that were breaking out against Spanish rule in the broad plains of southern Venezuela. In the meantime, Bolívar chose to sail to Jamaica to enlist British aid, which was refused. From there, he went to Haiti, which had been the first Latin American republic to become independent. With the support of the Haitian president Alexandre Pétion and with the naval aid of Luis Brión, another émigré, who was a merchant from Curaçao, Bolívar returned to Margarita Island, a secure republican redoubt, but his command of the republican forces was still not firm. Mariño, who had come back with Bolívar from Haiti, headed his own expeditions and succeeded in temporarily capturing Cumaná in 1817. With Brión supplying a small fleet, Bolívar sailed west along the Venezuelan coast to Ocumare de la Costa (the Expedition of Los Cayos), where, in fulfillment of Pétion's request, he officially proclaimed the end of slavery (although this went unheeded). Morales, back in Venezuela after subduing New Granada, attacked the republican expeditionary force with an army that vastly outnumbered the republicans. Bolívar fled, sailing once again to Haiti with Brión. However, Piar and Gregor MacGregor, a Scottish soldier of fortune, who had previously been active in New Granada, managed to escape with their forces into the interior of the country, defeating Morales at El Juncal in September 1816 before moving south to Guayana.