In a series of movies called Ip Man 1 and 2, based in WW2, a Wing Chun martial arts master called Ip Man fought with a Japanese general and a western boxer named Twister. Did these events actually happen?
Yip man was real (1, 2, 3, 4, 5, 6, 7). He was a famous student of Wing Chun. My guess is that you're referring to the 2008 movie, Ip Man. However, it was not historically accurate. Quoting its Wikipedia page:
Film4's review detailed the departures from history: "The real Ip Man was never, despite the film's assertions to the contrary, forced from bourgeois idleness into work by the hardships of the Second Sino-Japanese War, nor was he ever employed as a coolie in a colliery – rather he chose of his own accord to work as a policeman (a profession lightly ridiculed within the film) before the Japanese invasion, and he continued in this line for several years after the war until Communist disapproval of his wealth and political affiliations drove him into voluntary exile in Hong Kong (an inconvenient truth that the film elides as tactfully as Ip Man mitigates the impact of his own victories). While, during the war, Ip Man did indeed refuse to teach his martial arts to the military police of the occupying Japanese – a decision which eventually forced him to flee Foshan – he certainly never had a duel with a Japanese general."
So, although the film had inaccuracies, Yip Man was as real as any other human.
Grandmaster Yip Man did not fight any British boxing champion. In real life, it was actually Yip Man’s student, Wong Shun Leung ("Wong Leung" in the movie) who fought a 240 lbs Russian not British Boxer in Hong Kong and Wong Shun Leung won that fight by KO with just three punches!!! He did not in real life have to resort to any "Poison Hands" ! In the Movie, “Wong Leung” was portrayed as a student with average skill but in real life, everyone in the Wing Chun family knows that Wong Shun Leung was the man who put Wing Chun on the map in Hong Kong by winning 50-60 bare knuckle Challenge Matches against many different systems.
Actually, they were real,all incidents in this story might not be true,cause its a movie, but the fights were real of course,But, what ive heard from different people is that last fight(ip man vs twister) had some modifications in it.Actually it was quite longer,Extra scenes were added, actually ip man defeated Twister quickly same as Gen.Miura, but see since ive already mentioned its a movie, so extras will be added,otherwise it would be boring,and it would make people think that ip mans victory would be inevitable,