Does the poet feel sorry for the Light Brigade or is he just being sarcastic?

The poem by Tennyson has as its narrator a nameless person, whom throughout the poem makes it evident that he's been in the war that he describes. He wants to pass along the memory of what happened there, and to some extent seems to be reliving his 'glory' days. He does get sad when he talks about the terrible tragedies of war, but he just as much goes to the other extreme talking about the courage and heroism that comes out as a result of war.