Trakl was a genius who played a major role in the Expressionist movement during the first quarter of the twentieth century. The Encyclopedia Britannica offers this:
The patronage of a periodical publisher and of the philosopher Ludwig Wittgenstein, who secretly gave him part of a patrimony, enabled Trakl to devote himself to poetry; he brought out his first volume, Gedichte (“Poems”), in 1913. The following year he became a lieutenant in the army medical corps and, in Galicia, was placed in charge of 90 serious casualties whose agonies he, as a mere dispensing chemist, could hardly relieve. One patient killed himself while Trakl watched helplessly; he also saw deserters being hanged. He either attempted or threatened to shoot himself in the aftermath of these horrors and was sent to a military hospital at Cracow for observation. There he died of an overdose of cocaine, perhaps taken inadvertently.
Trakl's meter, rhyme, vocabulary, and lyric imagery make him a valuable influence in any German class.