As I'm sure you know, "After Blenheim" is an anti-war poem written by English Romantic poet laureate Robert Southey in 1796. I cant give you any text evidence as you have to quote it directly. Also this is a personal input question so I'll just give you my response to copy if you want:) (its below)
My response:)
While the battle was quite the feat, it was also very much "wicked" as stated by Willhelmine. I believe this because while any battle can help lead to good, no form of war itself will ever be good because of all the terrible things that happen.