Check my answer. under the articles of confederation, the government faced many challenges. the passage of the northwest ordinance of 1787 was considered one of the primary successes of the period. why was the northwest ordinance important? a. it established a system of taxation that required all states to contribute to the expenses of maintaining the northwest territory. b. it ended conflicts with all american indians in the northwest territory and provided equal treatment for everyone. c. it addressed the need for government in the northwest territory and established precedents for future governing of the united states. d. it ended slavery in the united states c?