The role of the famous 369th Infantry ‘Harlem Hellfighters’ band, led by James Reese Europe, has been widely told. If you’re not familiar with the story, you can read about it here or at Blair’s 2017 post on the subject here.
However, the 369th’s band wasn’t the only one playing jazz. The 370th Infantry band, a sister regiment to the Hellfighters, was another. Both of these units began as National Guard formations, the 369th was the 15th New York and the 370th was the 8th Illinois.
Here’s an article about the five bands.