Until now the Chicago Mercantile Battery for many years shared the unjustified obscurity of many western and trans-Mississippi theater units. Richard Williams has done a stellar job in putting flesh-on-the-bone of one of the more interesting artillery batteries to emerge from Illinois. Presenting and then carefully developing primary sources, the reader will walk away with a very complete and satisfying understanding of Chicago's mercantile battery and its heroic leader, Captain Patrick White. Well written, organized and attractively presented, this is certainly one of the better regimental histories I have had the privilege of reading.