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Back then, Seneca was part of the West Virginia Maneuver Area, a military training ground spanning five counties.
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And, truth to tell, I sometimes think Harrington is Grayson's proving ground.
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It's a proving ground for placing gear, and it breeds hard-nosed tradsters.
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Think of it as proving ground for a future political career.
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It was a proving ground for today's signature weapon: the improvised explosive device.
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For many, El Salto is the proving ground of hard Mexican sport climbing.