What is the Militia Immaculatae?
The Militia Immaculatae, or Knights of the Immaculata, is a worldwide Marian movement for the sanctification of Catholics and the conversion of all those who do not follow Christ, under the patronage of the Blessed Virgin Mary. It was founded by St. Maximilian Kolbe in 1917 as a movement to raise and include all Marian movements in response to the terrible forces arrayed against the Church in our times.
The Militia Immaculatae has been established in the U.S. District to be a powerful instrument to sanctify souls and to raise up vocations for Holy Mother the Church. Rev. Fr. Stehlin, District Superior of Asia, is the great apostle and Father Director of the movement which at the end of 2017 had more than 100,000 members worldwide.
"It is a movement which should attract the masses and snatch them away from Satan. Once souls have been won over to the Immaculata, there will also be a few who can be led further to the very height of devotion, even to the point of heroism in the service of spreading the Kingdom of God through the Immaculata. All religious orders and congregations, all the movements in the Church can also belong to the M.I. Membership in the M.I. will enable each member to give his best to the apostolate, and in this way attain Christian perfection in his state of life, in his vocation. It is necessary to understand the M.I. as something transcendent rather than general; this means that it should not be viewed as just one organization among many others; rather, it ought to penetrate into the depths of all other organizations.”
(From a letter of St. Maximilian Kolbe dated December 31, 1935).