Depends. I'm not going to die for my country 10000 miles away from it. In general that is less dying for your country and more dying for your country's ideology at best, or the greed of some influential groups at worst.
Even for an invasion threat, I wouldn't be fighting for my country. I may end up with the same ultimate objective as the government, but all that patriotism BS never worked with me. If you tried to give some rousing speech about the founding fathers and the revolution, I'd scoff, say something like, "that's really pretty but you wanna help me blow up this tank?", and get back to business. Largely, it would end up, better the devil you know.