D. He changed his commanding general several times.
Explanation:
The leadership strategy of president lincoln to have no policy and was a practical man. If unsatisfactory in practice he was will for another. He used to experiment with his commanding officers.
Along with various personnel of the organization and has changed the army change many times. He used to question the soundness of plans.
The conditions were different because germany had to pay millions of dollars due to the treaty of Versailles.Japan was different because they signed an alliance with Great Britain after WW1