While Haiti suffered major economic setbacks during the early years of the post revolutionary era, the ideals of freedom and anti-colonialism never ceased to be part of the Haitian consciousness. Citizenship was offered to any slave or oppressed person that made it to Haiti's shores as mandated by Dessaline's constitution. All four of Haiti's earlier rulers, Dessalines, Christophe, Petion, and Boyer all had programs that involved swaying African Americans to resettle there and assure their freedom. Slave boats that were captured and brought to Haiti's shores resulted in the liberation and integration of all captives on board into Haitian society. On one occasion, President Alexandre Petion protected Jamaican slaves from re-enslavement after they escaped their plantation and landed in the southern city of Jérémie. On multiple occasions, Haiti's leaders offered asylum to liberal revolutionaries globally. One of the more notable examples of this included Haiti's involvement with Gran Colombia, where Dessalines and Petion both offered aid, ammunitions, and asylum to Francisco de Miranda and Simon Bolivar, who even went as far as to credit Haiti for the liberation of his country. Dessalines offered citizenship and assistance to slaves in Martinique and Guadeloupe so that they could start their own uprisings. Mexican nationalists, Javier Mina and Jose Joaquin de Hererra took asylum in Les Cayes and were welcomed by Petion during Mexico's War of Independence. The Greeks later received support from President Boyer during their fight against the Ottomans.