Question: For which conflict did the Canadian Government award the Canada General Service Medal for attacks by an Irish Republican organization based in the United States against British army forts and custom posts in Canada?
Sentence (from "Fenian raids"): Between 1866 and 1871, the Fenian raids of the Fenian Brotherhood, an Irish Republican organization based in the United States, on British army forts, customs posts and other targets in Canada, were fought to bring pressure on Britain to withdraw from Ireland.
Relevant evidence: Yes