Fort Granger has three bastions. The map shows the location of each one.
By definition a bastion is:
a projecting work in a fortification designed to permit fire to the flanks along the face of the wall.
When entering the fort from the parking lot one walks right up to the middle bastion. You will be standing facing the MIddle bastion, looking south.
Armament (i.e., artillery) was placed in the cul de sac of each bastion. There were 30 pounders in Granger.
Each bastion sits roughly 15 feet from the ditch on the outside.
This Google map shows the relative position of Fort Granger in the larger scope of the battlefield (Franklin). Notice the Harpeth River running in front of the fort and the railroad to the west side (running north/south).
The Eastern flank portion of the Franklin battlefield was in the direct spray of artillery from Granger. Thus, Loring’s Division, and more specifically, Featherston’s Brigade, took the worst of the Federal onslaught of artillery from Granger.
Here is a video showing the middle bastion just as you enter the fort.
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