These were replaced by more powerful units in the early 1920s.

They plan to leave on June 4 and will in theory be replaced by other units.

But that does not mean 17 million new users; more than half the units will replace older ones.

Western officials differed on whether these troops could stay, or would have to be replaced by specialized units.

In addition her turbines were replaced by lighter, more modern, units.

They are now defunct, and have been approximately replaced by regional units.

They will be replaced by units of the 82nd Airborne Division.

These 2 units replaced the 3 steam locomotives which formerly provided all service.

Upon entering service in April 1993, the new units gradually replaced the previous 1962 tube stock, which was finally withdrawn two years later.

The twin round taillights were also replaced by rectangular units.