what military strategy did germany use that contributed to their successes in the beginning of world war ii?

Blitzkrieg

Explanation:

Blitzkrieg (Lightning War)  was the method of offensive warfare responsible for Nazi Germany's military successes in the early years of the Second World War.

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.

. political or economical policy that isolates a country from participating in international relationships. it has been suggested that the united states participates in isolationism because of its lack of involvement in particular wars or alliances.