E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Demobilisation of troops.
The disorganisation of them, the disarming of them. This is a French military term. To mobilise troops is to render them liable to be moved on service out of their quarters; to demobilise them is to send them home, so that they cannot be moved from their quarters against anyone. To change from a war to a peace footing.