In 1961, Oxford archaeologists uncovered a pit at the site of Gen. Gnaeus Julius Agricola's headquarters at Inchtuthil, the site of a Roman legionary fortress, in Scotland. Unsavory Caledonians had made his troops' position untenable.
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So the Romans decided to quit their empire's northernmost outpost, though not before going to extraordinary efforts to ensure they left nothing behind that could aid their enemies.
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