Here are some fun Battle of Gettysburg related statistics to use with your students:

Between the two armies there were approximately 72,243 horses present. Of these, nearly 3,000 – 5,000 were killed.  What percentage was killed?

Each horse requires 10 gallons of water per day, making the water needs for just the horses 722,430 gallons per day.  Where could they get all this water in and around the town of Gettysburg? (hint:  use Google Earth)

Each horse normally consumed twelve pounds of grain (oats preferably) and fourteen pounds of hay per day, making those requirements 866,916 pounds of grain per day and 1,011,402 pounds of hay.  How many farms were located around Gettysburg that would have these supplies?

Each horse produces twelve to fifteen pounds of manure per day. Using an average  of thirteen and a half pounds that makes close to 975,281 pounds of manure per day!

And each horse produces two gallons of the urine per day creating a tidal wave of 144,486 gallons per day.