Mobilisation
In short
Mobilisation is the process of assembling and preparing military troops, equipment, and supplies for active service or war.
In plain words
It is when a country gets its army ready to fight. This involves calling up soldiers and moving weapons and food to where they are needed.
A simple example
A nation might issue a call for reservists to report to their barracks and begin training for an upcoming conflict.
Why it matters
It allows a country to switch from a peaceful state to a wartime footing quickly. Without it, a military cannot respond effectively to sudden threats.
Easy to mix up
It is often confused with demobilisation, which is the process of discharging soldiers after a war ends.