This may amuse you. It's from a Wikipedia article on March
tempos<http://en.wikipedia.org/wiki/March_%28music%29>29>.
This is from the second paragraph under "History".
The march tempo of 120 beats or steps per minute was adapted by Napoleon
Bonaparte so that his army could move faster. Since he planned to occupy
the territory he conquered, instead of his soldiers carrying all of their
provisions with them, they would live off the land and march faster. The
French march tempo is faster than the traditional tempo of British marches;
the British call marches in the French tempo *quick marches*. Traditional
American marches use the French or quick march tempo. There are two reason
for this: First, U.S. military bands adopted the march tempos of France and
other continental European nations that aided the U.S. during its early
wars with Great Britain. Second, the composer of the greatest American
marches, John Philip Sousa, was of Portuguese and German descent. Portugal
used the French tempo exclusively—the standard Sousa learned during his
musical education. A military band playing or marching at the traditional
British march tempo (a more stately 88-112 beats per minute) would seem
unusually slow in the United States.
Tempos for the marches of other countries are listed in the article.
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