go into service—
1. begin to be used; become operational:
- One of the first jet bombers to go into service was the English Electric Canberra.
2. be employed as domestic servant:
- Ten years later she at last reached a higher station in life: she went into service with a Jewish couple.
3. join the armed forces:
- At the opening of the war he went into service as captain of Company I, Thirty-ninth Indiana Infantry.
Note: The expression does not fully correlate in meaning with the phrase come into service— = go into service 1:
- The suburban railway to the airport came into service last week.
go into the service— = go into service 3:
- It was World War II and we knew we would have to go into the service as soon as we turned eighteen.