Duarte left the country for the first as a teenager. Before coming to Europe, where he would go to study, he spent a brief time in the
United States. Although it is believed that he entered
North America through
New York, another version indicates that he did so through
Providence,
Rhode Island, on July 2, 1829, and that from there he went to New York. There, he studied
English, a language Mr. Groot had introduced him to in Santo Domingo. In addition, as mentioned by Rosa Duarte in
Notes, he began to study Universal Geography with Mr. W. Davis, who gave him classes at his home. According to historian Pedro Troncoso Sánchez, while in
Southampton,
England, Duarte would study philosophy, history, law, political science and geography. From Southampton, he continued on to France, where he arrived at
Le Havre and then traveled to
Paris. It was here that he perfected his
French, a language first introduced to him by Monsieur Bruat in Sano Domingo. While attending a banquet in Hamburg through a lodge called Oriente, he was introduced to
Freemasonry, absorbing the ideals of
liberty, equality and
fraternity. In Europe, engulfed in the era of
romanticism,
liberalism,
nationalism and utopian
socialism, numerous political and social events had shook several European nations in the second and third decades of the 19th century. After Napoleon's invasion of Spain in 1808, Duarte was curious to learn of the events in
Argentina,
Colombia,
Ecuador,
Venezuela and
Mexico, further influencing his liberal ideals towards his own country. Duarte presumably knew that the Spanish soldier and politician
Rafael del Riego had fought against the French occupation of Spain in 1808. The Spanish events of 1808 and the circumstances around the death of General Riego in 1823 were presumably discussed upon his arrival in Spain in 1828. Also upon Duarte's arrival in Spain, the events of the
Liberal Triennium (1820–1823) were still fresh. The fight for independence in America, the support of Ferdinand VII for the return to absolutism and the invasion of the
Hundred Thousand Sons of Saint Louis sponsored by the
Holy Alliance, caused the collapse of the liberal government and the return to absolutism on October 1, 1823. When Duarte was in Spain, the events of the
July Revolution of 1830 occurred in Paris. The figure of the Spanish liberal
José de Espronceda was disseminated in the trenches. This allowed liberalism in France to achieve victory against the conservatives who advocated that the
Bourbons will continue with the absolutist regime. According to military historian Rafael Percival Peña, Duarte also acquired military training during his time in Spain. While in Europe, Duarte understood that the Dominican people had their own identity as well as the absolute right to bring about political independence. Since the beginning of the 16th century, the Dominicans, despite economic disadvantages, had a history of rebelling and winning battles against
Dutch,
British, French and Spanish forces (the latter two of which were expelled from Santo Domingo by Dominican rebels in 1809 and 1821 respectively). Duarte firmly believed that the Dominicans would now have to rebel against the Haitians. Upon the success of this goal, the newly independent nation would be organized on the basis of the institutionalization of representative democracy. Having formalized these ideals, Duarte returned to his homeland in 1833. From Barcelona, he arrived in
Puerto Rico, then to
Saint Thomas, and finally to his native country. Duarte returned to his hometown of Santo Domingo and devoted himself to implementing his newly formed ideals while working in his father's business. According to historian Orlando Inoa, and backed by records from the Grand Oriente of Haiti chartered lodge Constante Union No. 8, Duarte became a free-mason at the legal age of 21. He was said to have been appointed as the Architect Decorator of this lodge. It is believed by some historians that some of his key collaborators were also members of this lodge. Duarte joined the
Haitian National Guard and furthered his military training and studied the military tactics of occupying forces, where he reached the rank of
colonel. Duarte lead an intense social life that allowed him to come into contact with many important sectors of urban communities. He witnessed marriages, sponsors, baptisms and attended cultural meetings. His societal experiences helped him realize that the general population was increasingly patriotic to Dominican ideals and that there was a historic movement of reluctance towards the increasingly despotic Haitian rule. Duarte's ideas were echoed within the middle class. For four consecutive years, from 1834 to 1838, he offered language and mathematics classes to a group of young people who went every afternoon to a warehouse on La Atarazana street. Duarte's popularity grew and many of his disciples began to feel a strong attachment to him. In a short time, the La Atarazana warehouse became the headquarters of a revolutionary movement. Duarte's teachings sought to separate the Dominican and Haitian parts of the island. These ideas were enthusiastically received by his students. ==Struggle for independence==