The system of checks and balances failed under andrew jackson when he

Refused to enforce a Supreme Court ruling

In the cases of Cherokee Nation v. Georgia and Worcester v. Georgia, the Supreme Court stated Georgia had no ability to move the Native Americans from the land. Jackson refused to enforce the decision and allowed Georgia to remove the Native Americans from land. Jackson provided military forces to help Georgia with the removal.

The Indian Removal and Jackson's overruling of the Supreme Court was a violation of the checks and balances. Jackson was often accused of extending his power as president. He argued he was giving states their rights back as sovereign lands. The Supreme Court cannot create laws and relies on the president and Congress to uphold their decisions.

a. because the u.s. was the leading with the most technology, economy, etc. also was teamed with other allies witch boosted the economy and materials to improve technology and use it.