We are indeed! Our full guidelines can be found here: http://warstoriesanthology.com/submissions/
In short, we're looking for original stories under 5000 words that deal with modern realities of war. They don't need to take place in the present day, but they should be relevant.
While we have two reprints already listed (from Joe Haldeman and Keith Brooke), we're not looking for additional reprints at this time.
Don't see the answer to your question? Ask the project creator directly.