on the force

How did he ever get on the force in the first place?

I used to be on the force, as you know.

She has been on the force for two and a half years.

He had been on the force for seven or eight years.

Each has been on the force for about three years.

He had been on the force for three years, she said.

"Because the power on the force field has been turned up and I have no choice."

At that time very few women were on the force.

At the end there is a question: Will he stay on the force?

And those 4,022 are 141 less than were on the force in January 1988.