A political scientist called Arreguin Toft totaled up all the wars of the past 200 years that occured between very large versus very small countries. Let’s say one side has to be at least 10 times bigger than the other. He looked at what percentage of wars had been won by the bigger side. And we might think it should be around 100% but it’s actually around 70%. And when he studied the wars even closer he found that when the smaller side used unconventional or guerrilla tactics they won 63% of the time. Smaller is not necessarily a disadvantage. (Source: Malcolm Gladwell's "David vs. Goliath")