They don't really have a choice.
They will be slaughtered, Billy.
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- Defender has the advantage.
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- They can't match nuclear, army or navy capability (especially navy)
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- They can't match people.
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- They can't match money.
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- They can't match manufacturing.
The only advantage they have is "Jesus", which, as we all know, is actually a disadvantage (though they are blissfully unaware).