All countries spend a lot of money on defense. I think it's like 20% in the USA. Wikipedia reliably* informs me that the UK has the forth largest defense budget in the world. That does seem like a lot; but then again, it's probably also one of the top targets (by other countries) too. The royal navy is a bit of an embarrassment, but then again, we don't need the navy like we used to. I don't think, if WW3 happened tomorrow, it would require the same tactics as WW1 and WW2 did.
What we do need are analysts, computers, servers; so much of the fight against this is digital now. Countries like USA, UK, NZ, Aus and Canada have an alliance that means if a war started, they would need to work together, as they have far too much investment and knowledge in each other's defense systems.
I don't know. I think the defense budget is probably just about right, right now.
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