The Carthage Police Department serves as a police force for a Vietnamese city of 50-70 thousand people who come to Carthage to attend the annual Marian Days festival. Marian Days is the main festival and pilgrimage for Vietnamese American Roman Catholics, celebrated since 1978 on the 28-acre campus of the Congregation of the Mother Co-Redemptrix in Carthage, Missouri. Vietnamese Americans from many parts of the United States, as well as non-Vietnamese locals and some visitors from Vietnam, attend the event.
The celebration is held during the summer in honor of the Virgin Mary. Marian Days offer opportunities for Reconciliation and prayer.
Pilgrims turn the surrounding area into a large campground, as many nearby residents allow then to erect tents on their lawns. Although the celebrations are centered around liturgy, they also feature a number of other events. Dioceses with large Vietnamese populations set up large tents to sell traditional Vietnamese food. Other organizations, such as the Knights of Columbus, also serve food to pilgrims in tents. Each night, singers entertain the large crowds with both folk and popular Vietnamese music.