In actuality, geography does not determine strategy. Indeed, geography, per se, does not even influence or condition strategy. What is the case is that man's knowledge of geography and the ideas that he derives from this knowledge influence and condition strategy.
Cohen, Saul B.
"Geography and Strategy: Their Interrelationship,"
Naval War College Review: Vol. 10
, Article 2.
Available at: https://digital-commons.usnwc.edu/nwc-review/vol10/iss10/2