If we all assembled in an army we could. But then again, so could any gathering of a hundred or so people.
Or just invade the micronation of MOLOSSIA! Wait that was already done before...so let's search for other micro-nations without an army to conquer.
What about Sovereign Military Hospitaller Order of Saint John of Jerusalem of Rhodes and of Malta, their population is 3. And in a way they're the smallest country on the planet.
But they hold no territory, and thus have no territory. We could always hold them hostage until they acknowledge us as their rulers.
I think we could take Liechtenstein, but I know we could take The Territory of the Sovereign Order of the Knights of Malta. http://voices.yahoo.com/the-territory-sovereign-order-knights-5326155.html
We could take Sealand like 1 person lives there. It has been tried before but when a 1 guy with mercenaries stormed Sealand. The Prince of Sealand then took the matters into his own hands and took it back. http://en.wikipedia.org/wiki/Principality_of_Sealand I have made a quick and easy plan of storming Sealand assuming we have more than 10 men.