https://archive.org/details/othersanantholo01kreygoog
Others, an Anthology of the New Verse
by Alfred Kreymborg
Published 1917
https://archive.org/details/othersanantholo00kreygoog
1916
https://archive.org/details/cu31924022030351
1919
These all have dozens of works by some of the best poets of the WWI era. Kreymborg, who was a poet in his own right, also compiled a series of anthologies in the 30's and 40's called Lyric America.
Others: Kreymborg's yearly poetry anthologies
My previous LV work: Bellona Times