In the 80s we patrolled the Nicaraguan border with Honduras. We were issued 6 loaded 30 round mags for our M-16 A2s and told that under no circumstances were we to get involved in any of the unrest that was going on there

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After each shift the magazines were turned in and you'd better be able to account for every round including the empty brass with a darn good reason for it being empty!
Fortunatly the biggest threat I ever faced was being shook down for $0.25 by some kid on a donkey selling questionable Coca-Colas.