Vincent did not limit his work to his homeland alone. Though the work in France was far from complete, he was more than willing to send missioners to Rome, Ireland and Poland when asked. Those sent to Ireland went in difficult circumstances, arriving in early 1647 after a hazardous journey. In the short time they were able to stay before leaving, they achieved a huge amount of good.
“They produced more fruit and converted more souls than all the rest of the ecclesiastics. Moreover, their good example and upright conduct have converted a great number of the nobility, both men and women, and these have become models of virtue and piety. Such a thing was never seen here before your missioners came to these parts. And although these good priests have suffered many trials since they arrived in this country that has not prevented them from devoting themselves continuously to the works of this mission.” Bishops of Cashel and Limerick
Some of the missioners left for France in fear of their lives. Some were not so lucky. Fr. Tahddeus Lee, the youngest of the Irish missioners was brutally martyred infront of his mother. The Irish mission was the first overseas venture for the Congregation and the first to claim lives of the missioners. This did not deter the company. Some who escaped went on eventually to begin a new mission in Scotland.
The Vincentians have continued to establish new missions throughout the world, Madagascar, China, Nigeria, Belarus to name a few; always going where the poor are, those who are poor spiritually and materially.