They shall grow not old, as we that are left grow old:
Age shall not weary them, nor the years condemn.
At the going down of the sun and in the morning,
We will remember them.
That's the bit that everyone knows
I am quite taken with this bit to:
Solemn the drums thrill: Death august and royal
Sings sorrow up into immortal spheres.
There is music in the midst of desolation
And a glory that shines upon our tears.
(it's folk music i think)
and this bit
Moving in marches upon the heavenly plain,
As the stars that are starry in the time of our darkness,
To the end, to the end, they remain.
It's Lawrence Binyon's 'For the Fallen'.