I definitely see a few literary devices at work here.
"worry in every language" = metaphor
"my country tis of--" = allusion
"by gorry by jingo by gee by gosh by gum" = alliteration + dialect/slang (diction)
rushed like lions to the roaring slaughter = simile + personificataion
If you are looking for general feedback on your poetry, there are a few more pieces of writing advice I offer beyond recognizing your literary elements, however.
One important thing to note about poetry, is that although the form and technical (or formal) rules of writing can be bent, poetry does not throw them out altogether. In fact, a lack of capitalization and punctuation within poetry needs to be purposeful. As far as style goes, without any decisive line breaks nor punctuation, this poem sounds like a run-on sentence. Is this intentional? I view the uncapitalized "i" as an oversight.
The sarcastic tone is not quite as evident as the sheer emotional tone. I certainly would have picked up on a flippancy, but it seems undirected. Sarcasm usually indicates anger, frustration, or a feeling of threat. At whom is this supposed to be directed?
I think this poem is full of emotion and the emotion overrides the subject. In fact, what exactly is the subject of this poem? America? Something America is doing wrong? Someone who has been hurt by America?
These are just some points to consider. Contrary to what many think, poetry is not an arbitrary combination of words held together by figurative language and emotion. These are certainly not bad places to start and I think you have some great ideas generated in the above, but I woulnd't necessarily consider this a final draft.