The heading, where did it come from?
Pack-drill was a punishment given to soldiers in the British Army, requiring them to undertake drill (exercise) in full uniform and carrying a heavy pack.
'No names, no pack-drill' is used to indicate that the names of those who have committed a misdemeanour will not be mentioned in order to spare them punishment.
The 'pack-drill' punishment is known from at least 1845, when it was referred to in William Maxwell's Hints to a soldier on service:
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