The support trench served to house reinforcements, and supplies, for the front line troops that could be quickly transported to the front line trench. A third type of trench was commonly referred to as a reserve trench and was found dug "several hundred yards" behind the support and front line trenches.
I think it was NATO (North Atlantic Treaty Organization).
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It wasn't until the 16th century that the Polish mathematician and astronomer Nicolaus Copernicus presented the heliocentric model of the Solar System, where the Earth and the other planets orbited around the Sun
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