[5] He enlisted in the Papal Body Guard in the Vatican in 1864,[4] and he played with the First Cacciatori Band of Rome for two years, and in 1866, he performed on the bugle in Garibaldi's army.

[5] One year later in 1876, he became an official American citizen and his bands were asked to perform at the nation's Centennial Exposition in Philadelphia.

In 1877, he joined J. Thomas Baldwin's Boston Cadet Band as cornet soloist, playing at the opening of the Brighton Beach Hotel on Coney Island.

Carlo A. Cappa persuaded Gilmore to hire Allessandro as an alternate cornet soloist in 1878, and by 1879, he was equally billed with such names as Arbuckle, Bent, Emerson, and Levy.

He was engaged as soloist in various venues, e.g., the 1881 Yorktown Centennial Celebration (likely with Harvey Dodworth's Thirteenth Regiment Band), the West End Resort in New Orleans (1883), and the Southern Exposition in Louisville, Kentucky (1883).

[8] Also in that same year, he performed solos at Golden Gate Park in San Francisco, and he was Bandmaster of the Seventy-first Regimental National Guard Band in New York City.

[10] The World Renowned Liberati Band traveled extensively and developed a reputation in the United States and Canada.

Riding on a black stallion and wearing his uniform decorated with many medals, Liberati performed on a golden cornet while directing the band.

Before him had been Matthew Arbuckle, who was notable for his mastery over tone, and whose artistic interpretations and versatile musicianship won the admiration and appreciation of even the most exacting.

He applied himself to the delicate soft staccato, making it a veritable specialty of his, and Levy's rubato was the bane of his accompanists and often puzzled his hearers; so Liberati adopted a method of utmost precision.

"[3] Liberati's system of acquiring his style is founded on the bedrock of virtuosoship: persevering, persistent, faithful work of the severest nature.

Then, with a metronome as his guide in tempo, he practiced scales in all keys—always in a light staccato—until he could play them with absolute precision, in both time and tune.

Although then regarded as an artist, Liberati learned that he could not play a simple scale with evenness, but by diligence he gained the point he sought.

Liberati was noted as the "hardest working soloist before the public", and it was said that "no task was too severe or forbidding for him and he deserves all the success he has enjoyed.

The New York Times reported "An automobile containing Signor Liberati, the cornet virtuoso, and several prominent business men, was struck by a street car today while touring in the outskirts of the city.