I agree completely. However, there's room for debate whether military support really counts as "neighbors helping neighbors," because it isn't voluntary. The funding is not voluntary, and if a draft is in place the personnel are not volunteers either.
--Len.
While I believe that they received some government money, I do remember that the unit in China was 100% volunteer.
As for the self defense, and one of the reasons I consider myself a moderate or small 'L' libertarian is that, especially when it comes to countries, offense is greater than defense today. At least as long as you're not trying to occupy the country - sweeping through, killing people and destroying stuff is quite easy compared to trying to stop such an advance.
As such, until 100% of the world goes down a libertarian path, we're going to need a professional military, capable of offensive operations that a bunch of citizens with small arms can't perform.
I'd rather stop invaders short of our soil. In addition, fighting a pure defensive war allows our opponent(s) to pour resources in for as long as it takes. You have to take the fight to the enemy.
And it's not like the military hasn't been able to meet it's long term recruitment goes - it may have had to offer more money and loosen enlistment requirements - but it's still made it's goals.
Keep the government out of people's day to day lives - but there's still a need for police, courts, and military.