This is once again one of those very abstract concepts which has as many interpretations as there are minds in the world. Freedom. Freedom from what?
People go to war over 'freedom issues.' The free settlers in 19th Century America wanted freedom to settle on the land - wherever they could and wherever they wanted. The native Indians, on the other hand, wanted to be free to pursue life as they were used to it. In any conflict between the two, both were fighting for 'freedom.'
Some people opt for 'free trade' between nations. Others want to be free to put on tariffs and trade barriers so their people can be free of the econmic dominance of the 'free traders.'
The point I'm making is that when you used a phrase like "defend freedom" you need to provide some context and a little more detail.