The Michigan-Illinois or Illinois and Michigan canal was the most incredible point failure zone in the western Hemisphere during the Civil War era and easily top five for the world. It was paralleled by a railway to takeover some of the load when tornadoes, droughts, ice flows, flooding or whatnot shut it down, which happened quite regularly. Much of the food supply of the industrial Midwest, Northeast and believe it or don't a decent fraction of British food shipped through this canal. The reason that this is of interest is that I am working up a game based on the idea of using powered kites to bomb this canal. So why didn't the south use raiders to tie up troops. Likewise the Ohio-Erie canal was critical and easy to reach from what was still the VA wedge between Ohio and PA. I'm smart but not smarter than every officer on both sides so what am I missing?