I've never read Battlefield Earth, but I found The Forever War to be a really interesting view on the effects that relativity would have on light-year-scale war

I've never read Battlefield Earth, but I found The Forever War to be a really interesting view on the effects that relativity would have on light-year-scale war (and the expansion of the human race). http://en.wikipedia.org/wiki/The_Forever_War http://en.wikipedia.org/wiki/The_Forever_War