The following years saw Taché serving a widespread region of which about half of the population were Catholics. He was involved in the difficult years when the Territories were absorbed into Canada. He also traveled to Europe, where he sought assistance from his congregation, funds and volunteers. The most prominent were Constantine Scollen and Emile Petitot who went to Canada with him in 1862. In the unrest among the Métis people in the political process, he was called upon by the federal government to act as its representative to avoid the possibility of a civil war. He was even called back by them from Rome in 1870, where he was participating in the First Vatican Council, to reach out to Métis leaders who were leading a rebellion against the Canadian government. However, the Oblate policy of encouraging Catholic families to settle in the homeland of the Metis and First Nations peoples meant that he had little influence and he was unable to prevent the Riel Rebellion of 1885.