Coggins J. The fighting man: An illustrated history of the world's greatest fighting forces through the ages

New York: Doubleday, 1966. — 372 p.
As this book has shown, there is no scientific way of assessing the worth of the fighting man of the nation over those of others. For courage, that most vital element of the combat soldier, we have seen to be drained away by continuous use. Also, like a battery, it can be recharged.the ancient world.
the greeks.
the romans.
the vikings.
the normans.
the mongols.
the bowmen of England.
the swiss pikemen.
the spaniands.
the swedes.
the prussians of Frederick the Great.
the napoleonic wars.
the germans.
the russians.
the french.
the british.
the japanese.
the chinese.
the united states.