In 1866, Liechtenstein sent an armed force of 80 soldiers to defend their territory’s border during the Austro-Prussian War.
They returned with 81 soldiers, having avoided any battles and making a friend along the way.
In 1868, Liechtenstein disbanded their army.
https://www.wearethemighty.com/mighty-history/liechtenstein-army-81-men-returned/
@dgar I know a few countries that take draconic measures to stop immigration but Lichtenstein is on a whole new level.