Do you think that a general’s win loss record on the battlefield is the best gauge of measuring greatness as a military leader

No.

Explanation:

Because there are a lot of factors that go into a battle,  a lot of which the general can not control. Like the timing of when they get attacked, or how many men the other army has. So the battlefield record isn't really a good representation of the general, it is of the whole army.

the doctrine of nullification recommended that states living inside the union have the one-sided, inalienable ideal to void any law made by the national government that could be esteemed illegal.

the united states was shaped based on a general agreement among its individual states. hence, it is inferred that under the hypothesis of invalidation, since the states are the establishment of the union, they have the ability to referee and disprove unlawful laws.