In "twain's "the private history of a campaign tha failed," smith, the blacksmith's apprentice, is given "ultimate credit" for

In Twain's "The Private History of a campaign that failed," Smith, the blacksmith's apprentice, is given the "ultimate credit" for sticking up to the war, where he was killed. 

Below is the exact quotation derived from Twain's story about Smith, the blacksmith's apprentice:

"However, he had one ultimate credit to his account which some of us hadn't. He stuck to the war and was killed in battle at last."