The first stage of this cache will take you to the historical sign which discusses the aftermath of the US - Dakota war of 1862. This cache is winter friendly but the final is large enough for the log only. To get coordinates to the final you must solve this puzzle. You will need to know basic math and the order of operations to solve this puzzle. You may want a calculator to solve this puzzle, but it is not required.
N 44 A.B W 094 C.D
A = The year Jesse V. Branham, Sr,. William Branham, and William and Charles Kruger harvested grain (-) 1804
B = The number of miles south of Forest City the grain was harvested (+) 643
C = The number of horses missing (x) 13 (+) 1
D = The number of Dakota men who stole the horses (/) .001 -1285