Conclusion
Steuben's training and hygienic innovations helped the Americans hold their own. Washington was crucial to maintaining morale:
Professor Daniel Crosswell, Colonel Richard R. Hallock Distinguished University Chair in Military History, Columbus State University, talks about the worth of Washington.
The French also supplied men, materials, and at Yorktown a knowledge of siege warfare. But French aid was insignificant at Monmouth and Guilford Courthouse, and Steuben's training enabled the taking of the redoubts at Yorktown. Morale, men, and materiel would not have mattered if Steuben had not trained the Americans to win battles.
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