The life of Patrick Edward Connor serves as a half-century slice of western American history. After leaving New York City, where he had arrived at the age of twelve as a poor Irish immigrant, the nineteen-year-old youth joined the U.S. Army in 1839. He fought in the war with Mexico and then joined the gold rush in California until marrying and settling down in Stockton in 1854. The Civil War found him volunteering again, this time as colonel...