When did michigan state join the big ten?
The conference was again known as the Big Nine after the University of Chicago decided to de-emphasize varsity athletics just after World War II. Chicago discontinued its football program in 1939 and withdrew from the conference in 1946 after struggling to obtain victories in many conference matchups. It was believed that one of several schools, notably Iowa State, Marquette, Michigan State, Nebraska, Notre Dame, and Pittsburgh would replace Chicago at the time. On May 20, 1949, Michigan State ended the speculation by joining and the conference was again known as the Big Ten. The Big Ten's membership would remain unchanged for the next 40 years. The conference's official name throughout this period remained the Intercollegiate Conference of Faculty Representatives. It did not formally adopt the name "Big Ten" until 1987, when it was incorporated as a not-for-profit corporation.
When did Michigan state officially join the Big Ten?
May 20, 1949
Big Ten Conference
No context provided
What was Michigan State's first season playing in the Big Ten?
1953
Big Ten Conference
https://en.wikipedia.org/wiki/Big%20Ten%20Conference
 In 1953, Michigan State's first year of conference play in the Big Ten, the Spartans shared the conference title with Illinois
Michigan State Spartans football
On May 20, 1949, Michigan State ended the speculation by joining and the conference was again known as the Big Ten.
Big Ten Conference
On May 20, 1949, Michigan State joined the Big Ten Conference. They started playing football in 1953, when they shared the conference title with Illinois.