Hey, nice stuff!
I liked the whole concept behind the track! The beginning piano was nice and then you layered up to it the national anthems theme - nicely done sounds great.
Then comes the change: the whole glorious stuff changes to a war-like song: like a war machine would get into movement to rush down its targets. Really epic and great sound! Only one thing I didn't liked - that was the reaaaly high pitched strings. I think you should avoid these or at least make there volume lover.
Then the song slowes down: great! I loved it. Another epic boom - choir in the background sad and epic melody... But the high pitched strings coming up again... well the same goes here. Or you should maybe use another instrumet instead of string at that part like piccolos or flutes. The provide tha same high tone sound but not so ear-hurting way.
I'd also suggest to change the strings attack-level in the end part that they start with some fade in to make the feeling more sad and epic. In this way they are a bit to rough.
Summing up: this song has great potential. The composition and melody was perfect - I cound't find any negative things in it. So keep up the good work, you got talent!