Hi Phyllis. That depends on the crisis. I'm sure if there were a real crisis, like an armed invasion, Americans would generally pull together and form an armed resistance--one that would allow us to go back home and sleep in a bed every night, of course. But I think most Americans are wise enough now to recognize this sort of rhetoric when they hear it. It doesn't usually mean "defense". It means we're getting ready to invade another country and go to war for reasons we don't entirely understand or care about. After decades of learning our lessons and seeing death and maimed bodies and asking "why?", the majority of men have figured out that it's best to just stay home from this type of "crisis" and help out on the home front; if at all. There are a few noble types who are always willing to fight and sacrifice (I was one once), but these folks are rare today. The folks that go into the military today are either "mercenary" types who join for the bonuses and free healthcare and pensions; or they're of that small sub-class of enthusiasts (not unlike dog breeders or others united in an acute common set of interests).
From 2001 to 2009, we had a former cheerleader from Yale as the President of the United States (he was a natural on the megaphone in 2001 before the crowds in New York City). Ever the cheerleader, he never faltered in encouraging the troops and rallying folks back home. It seems he sort of set an example for us all for the worse. We seem to be a nation of cheerleaders who cheer for war, encourage others to fight for us and we thank them for it. Then we go back to bed. That's how America comes to the aide of its country (AKA fights a war). I like to see the honesty of people who either ignore the war completely or who choose to fight. And it is ok to see the odd veteran now and then who supports a war, but is now too old to fight. But (and excuse me, please) to see able-bodied young men rallying for war and violence, but refusing to serve is disgraceful. At least in countries like Britain the royal family sets the example and serves in conflicts. How do our leaders set an example? Why should anyone do as they ask when they want us to come to the country's aide?