The Fetterman Fight demonstrated their ability to destroy a command of 81 men caught in the open.

It did not demonstrate the ability to take a well-constructed fortification defended by several hundred soldiers with artillery.

The strategy avoided this requirement by making direct assault unnecessary.

The forts didn’t need to be taken.

They needed to be made irrelevant, and the systematic pressure on the trail and its users accomplished that.

The Commission Reports and the Political Decision

The detailed paper trail of the decision to abandon the Bozeman Trail forts reveals the specific political reasoning that produced the outcome.