Roman Catholic Diocese of Helena Roman Catholic Diocese of Helena The Diocese of Helena () is the Catholic diocese for western Montana with its cathedral located in Helena, the state capital. The diocese was erected from the year-old Vicarate of Montana on March 7, 1884, while Montana was still a territory. The diocese is a suffragan of the Archdiocese of Portland, which encompasses Oregon, Idaho, and Montana. Before becoming a diocese, this was the Vicariate of Montana (covering the whole territory and then state of Montana). For its first twenty years, the diocese served all of Montana. In 1904 the new Diocese of Great Falls-Billings
Helena Artillery The Helena Artillery was organized at Helena, Phillips County, Arkansas, on April 27, 1861. The battery was enrolled in State service for three months on April 29, 1861. Captain A. W. Clarkson was the first commander of the battery, which was initially composed primarily of Phillips County men. Many of the enlistments in the battery appear to have been from the Irish immigrants who worked in the dockyard at Helena. Approximately 50 of the names of the battery appear to be of Irish nationality. On July 6, 1861, the battery was mustered into Confederate service for twelve months (later extended