He was the principal organizer of Cuba's war against Spain.
<u>Explanation:</u>
José Martí ( José Julián Martí Pérez) was Cuba's famous poet, journalist, essayist, translator, publisher, and professor who lived in the second half of 19th century. He was Cuba's national hero due to his role in his country's freedom.
Through his political activity and writings, he considered being the symbol of Cuba's advancement for its independence. He preached about Cuba's independence which gave him the name "apostle of Cuban independence".
He wrote that Spanish's control over the country was completely a threat to our land. Also, it was so unnatural that Spain controlling and oppressing Cuba, even though it having its own culture and identity. Another reason he criticized Spain that Spain failed to abolish slavery.