Premiered in Philadelphia on May 30, 1901, Invincible Eagle was intended for the Pan American Exposition in Buffalo, NY, where the composer eventually did lead his band in performances of it. One of Sousa's more popular marches, it did not quite achieve the success of Stars and Stripes, despite the composer's feeling that it would.

Many listeners often assume the instrumentation in Sousa's band compositions is somehow less complex, more an automatic kind of sound to achieve. Hearing familiar masterworks like Invincible Eagle and Stars and Stripes might especially reinforce such an errant view. But it was in compositions like these that he helped lay the foundation for the sound world of patriotic and celebratory band music. Invincible Eagle opens with a brief fanfare and then presents one of those typically bouncy, festive themes, suggesting little that is heroic or patriotic, but so much that is typical of Sousa's style. As the piece develops, however, it turns more dramatic, its nonchalant manner and fanfare-like episodes divulging greater heroism. Textures grow denser and the main theme transforms, taking on a more confident and less playful demeanor. In the end, this march must be assessed as on the same level with Stars and Stripes and Sousa's other masterful band works.

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