Why did Leo XIII compose the Saint Michael prayer?

Dr Taylor Marshall Podcast "706: Satan Debates God: “I need 50-60 more years!” Is this vision of Pope Leo XIII in 1886 real?"

Support this Podcaster:
https://www.patreon.com/drtaylormarshall

Dr Marshall's Book: Infiltration - The Plot to Destroy the Church from Within: https://amzn.to/2ENisHk

Website: https://taylormarshall.com/

Take Dr. Marshall’s online Catholic courses by signing up as a student: https://newsaintthomas.com/

Thank you!