Final answer:
Nationalistic composers conveyed their sense of national pride by incorporating their nation's cultural traditions, folk melodies, and historical narratives into their music, thus fostering a national identity that coincided with political and social movements of the time.
Step-by-step explanation:
Nationalistic composers expressed their nationalism through the use of musical elements that reflected their country's traditions, folk tunes, dances, and histories, thus creating a sense of national identity in their compositions. This was seen during the post-Romantic era, where composers focused on the music of their homelands, contributing to the rise of nationalistic music. Composers like Dvořák and Sibelius are examples who incorporated national folk elements into their works, which resonated with the national pride and cultural heritage of their respective countries.
Moreover, the idea of national identity evolved to become a pivotal force in music during the late Napoleonic period. Across Europe, nationalism became enshrined in the works of many composers who sought unity within their homelands while fostering a unique cultural identity. Celebrating one's national heritage through music became a form of self-expression and political statement, reflecting the broader nationalistic movements that sought autonomy and independence in the fabric of European history.