A potential cost for a government leader using a cost-benefit analysis is that the leader will fail to consider all the variables that will contribute to the outcome of whatever he or she is planning, since it is often hard to anticipate all possible scenarios in such an analysis.
Would have to look into the branches of government
The time of great learning during Charlemagne's reign was the time known as the Carolingian "A. Renaissance," since this means literally a "re-birth" and discovery of knowledge.
Answer: Napoleon decide to invade Russia in 1812 with an Army of 500,000 men and although he defeated the Russians at the battle of Borodino in 1812
Explanation: he was forced to retreat due to weather, costing him most of his army and marking the beginning of the end.