Working on this theme, the Ministry of Magic might be a bit less strict on the whole SoS, to the point where you might get offered a job by the MoM or the Muggle Ministry if you see a major magical event and handle it well. If you refuse you still get mindwiped. Also the Regiment helped fight in the First war, which resulted in it "ending"
in 1971, 1972, 1973 (three times), 1975, 1977, and 1981, due to Vordemort going "LOL Horcrux!" In return, Vordemort has started recruiting various terrorist groups to serve as his hands in the Muggle World, resulting in the bombing of Big Ben after his return in 1991.