Earlier quoted context omitted.
The right to bear arms is also, explicitly, a protection against tyranny BY the government. Thomas Jefferson: ""When governments fear the people, there is liberty. When the people fear the government, there is tyranny. The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government."
Interesting. But, how does owning a gun provide protection against the US military?
I don't understand why people keep asking this question, and variations of it, or offering up the argument "the 2A is useless for allowing rebellion since you can't defeat the US military".
Bands of rebels armed with mostly light weapons have caused superpowers all sorts of issues: See Afghanistan, from the Soviet era through today.
And if a full fledged rebellion did break out in the US, here are a few points to consider:
1. It's likely that at least some military units would side with the rebels. So you're already not talking about a case of just "you and your AR-15 versus tanks and F-16's".
2. Nukes are effectively "off the table" since there wouldn't be much point in nuking your own country, as there wouldn't be anything left to rule.
3. A hypothetical rebellion would not be limited to just AR-15's and what-not... factor in IEDs and various kinds of improved weapons.
4. And factor in stolen / captured military weapons.
5. And factor in military weapons provided, illicitly, to the rebels by the manufacturers, distributors, foreign groups, and gosh knows who else.
6. The population of the US is somewhere north of 300 million people, right? And a significant portion of the population own firearms. How many members are in the standing US military? According to Wikipedia, there are 1,429,995 active duty members of the US armed forces. IF a rebellion had sufficient popular support, consider, as they say, that quantity has a quality all it's own.
Anyway, the point is to say that it's not as simple as "you and a gun versus the US military" if you look at the big picture. I mean, sure, if it's just you and you take on a tank with an AR-15, they're just going to run you over, game over. But if an actual, massed rebellion, with lots of popular support were to break out, those guns do matter.