The Catholic Motor Missions operated from 1935 to 1965 to combat anti-Catholic prejudice. Traveling throughout Missouri by car with a portable pulpit and a public address system, Vincentians gave informal talks on the most controversial or misunderstood aspects of Catholicism. They also had a box through which people could submit anonymous questions about the faith. Since the missioners were addressing fundamentalist Protestants, the talks were grounded in references to the King James Bible. The missioners never took collections or attempted conversions. The missions later became a way to reach Catholics as well. They were very successful and inspired similar efforts around the country.
McKenna, Patrick C.M.
"The Catholic Motor Missions in Missouri,"
Vincentian Heritage Journal: Vol. 7:
1, Article 4.
Available at: https://via.library.depaul.edu/vhj/vol7/iss1/4