For Want of a Winter Horseshoe

The BBC has an interesting magazine piece about military logistics, and it touches on several key incidents in history. I took notice of this part of the story of Napoleon's invasion of Russia in 1812:

This is the first I have heard of this issue. One of the oldest stories about the collapse of the Grand Armee in Russia has always centered around the cheap tin buttons on the greatcoats of the soldiers:

I would think that both facts had an impact on the fortunes of Napoleon's men.