In time of national emergency, guard units may be called into federal service.

It later was called into service to protect the Mexican border in 1916.

Large factory sites were called into service to house the crowd.

He left the militia in 1846 but was called back into service from 1860 to 1862.

At least the ship's morgue hadn't been called into service yet.

At the height of their affair, Peter is suddenly called back into service.

They could not be called into service again until darkness swallowed the days light.

They may also be called into military service on behalf of the empire.

Photography, itself a medium quite at home with mass production, was called into service.

As we had only one ice saw, the carving knife was called into service.