Check out the Italian Futurists. I know more about them from art school than how they fit into the timeline of the war, Italy entering later on the side of the Allies. The myth I heard is they all died in the war which they supported vehemently.
Boccioni made one of the greatest modernist sculptures of all time and also allied himself with a movement whose manifesto says;
We will glorify war—the world’s only hygiene—militarism, patriotism, the destructive gesture of freedom-bringers, beautiful ideas worth dying for, and scorn for woman.
Boccioni died when he fell off a horse. I just think that's funny.
The whole Manifesto reads like deluded ramblings to the point where I can't believe this group is remembered. I'm not up on my early 20th century artistic manifesto style sheet though. Writing a manifesto was seemingly popular then.
They also influenced Fascism. And died in war. Comical irony to me. Goddamn if that isn't a fine bronze though.