The Armory Show of 1913, according to Wikipedia,
refers to the International Exhibition of Modern Art that was organized by the Association of American Painters and Sculptors and opened in New York City’s 69th Regiment Armory, … and became a legendary watershed date in the history of American art, introducing astonished New Yorkers, accustomed to realistic art, to modern art. The show served as a catalyst for American artists, who became more independent and created their own “artistic language”.
Among one of the people running it was Walt Kuhn. Picasso sent him this list of recommended artists for the show:
Of course it is a great list of talent, including Braque, who seems to have been added as an afterthought. Found at the site, Brain Pickings, that has some must see Lists, To-dos and Illustrated Inventories of Great Artists (though the image courtesy of the Smithsonian Institution’s Archives of American Art; copyright F+W Media Inc. 2011).
More on the Armory Show here. It is a remarkable piece of American cultural history.