Liechtenstein is a tiny country in the middle of Europe, between Austria and Switzerland with a size of roughly 160 square kilometres (62 square miles). In 1866, it’s 80 men strong army wanted to join Austria to fight the Prussians.
The not-so-mighty Liechtenstein army was too late when they arrived. The war was already over and Prussia won. The army of Liechtenstein returned home and brought an Italian friend as well. Only 2 years later, the army was disbanded due to financial reasons.
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By Asurnipal (Own work) [CC BY-SA 4.0 (http://creativecommons.org/licenses/by-sa/4.0)], via Wikimedia Commons