Modern war gaming arose in Germany in the eighteenth and nineteenth centuries and greatly contributed to the superb quality of the German military in the twentieth. Aspects of the German approach would have substantial value for the U.S. military today.
"German War Gaming,"
Naval War College Review: Vol. 65:
4, Article 10.
Available at: https://digital-commons.usnwc.edu/nwc-review/vol65/iss4/10