Of course they have combat sensor's. Otherwise they couldn't hit anything at 24.6LM.
And what about all the other ones?
And when your enemies have fleets numbering in the millions, there's no such thing as overkill.
Now, go over to the Baen website and buy 'Empire From the Ashes' for a good read of Weber's early work.
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If I only could remember half the things I'd forgot, that would be a lot of stuff, I think - I don't know; I forgot!
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Some of my webcomics. I've got 400+ webcomics at Last count, some dead.
Sig updated to remove non-working links.