An Indonesian nationalist is someone who advocates for the unity and independence of Indonesia as a nation. This movement gained momentum in the early 20th century, particularly during the struggle against colonial rule by the Dutch. Nationalists sought to promote a sense of national identity and pride among the diverse ethnic groups within the archipelago. Key figures in the Indonesian nationalist movement include Sukarno, who later became the first president of Indonesia, and Mohammad Hatta, who served as vice president. These leaders played crucial roles in the country's declaration of independence in 1945, emphasizing the importance of self-determination and sovereignty for the Indonesian people.