I have some questions can anyone help me 1.the continued problem with Britain spain and france ??

2.explain why this event was the nail in the coffin for the Articles of confederation​

after the spaniards introduced horses to plains native americans, the lives of the tribes changed. tribes became less settled and sedentary. the horse allowed them to hunt animals such as bison or buffalo, and, instead of staying in one place, tribes began to be nomadic.