To find this cache go to the posted coordinates and learn something new. Use that knowledge to answer the following questions and get the coordinates to the final location.
The final cache can be found at N 43 01.ABC - W 077 56.EFG
Take a look at the side of the sign facing the south.
A = The number of times the letter 'E' appears in the second line of the sign +1 (The line that begins with a G)
B = The year he died - 1810
C = The number of wars he served in + 2 (The French and Indian War is only One)
E = The two numbers from his death age added together - 1
F = Seven
G = The number of OTHER know French and Indian War vets from Genesee County + 8
That's it, now go find the cache.
N 43 01.ABC W 077 56.EFG
You can validate your puzzle solution with certitude.