When the Saints Came Marching In covers the history of the Latter-day Saints from the time Mormon missionaries first stepped foot on St. Louis soil (1831) until the occasion of the St. Lous Stake jubilee in 2008. It is written with gratitude for the tolerant spirit manifest by the city of St. Louis both then and now. For some, the St. Louis Arch represents not only a gateway to the West but also a symbol of acceptance and brotherhood, through which peoples of all cultures and faiths can pass with the assurance of mutual respect.