Question

what is called mobilization
​

Answer 1

Explanation:

Mobilization is the act of assembling and readying military troops and supplies for war. The word mobilization was first used in a military context in the 1850s to describe the preparation of the Prussian Army.

Answer 2

Mobilisation- The action of a country or its government preparing and organising troops for active service.
Or
The action of making something movable or capable of movement.