In the United States v. Northern Pacific Railway Company case of 1920, the U.S. Supreme Court ruled on a dispute over land grants given to railway companies during westward expansion in the late 19th century. The government had granted large tracts of public lands to encourage railroad construction across wilderness areas, with certain conditions attached regarding their use and disposal. However, it was found that Northern Pacific Railway Company violated these terms by selling or leasing some of this land for non-railroad purposes such as timber harvesting and farming without giving due notice to settlers who might have claimed them under homestead laws. The court held that even though Congress intended for railroads to profit from these lands as an incentive for building tracks and infrastructure, they were not meant to be used indiscriminately or monopolistically at expense of potential settlers' rights or public interest. Therefore, any sales or leases made contrary to original grant's restrictions were deemed invalid; those portions must revert back into federal ownership unless already occupied by bona fide settlers. This decision underscored importance of honoring Congressional intent behind land grants while balancing private property rights against broader societal needs like settlement and development.

In the dissenting opinion for the United States v. Northern Pacific Railway Company case, it was argued that the majority's decision to void certain land grants given to the railway company by Congress in 1864 was incorrect. The dissenting justices believed that these land grants were not "in aid of construction" as suggested by the majority, but rather a reward for services rendered and risks taken on behalf of public interest during a time when such ventures were fraught with uncertainty. They contended that this interpretation had been upheld in previous court decisions and should be respected under principles of stare decisis (the legal principle of determining points in litigation according to precedent). Furthermore, they disagreed with how broadly the majority interpreted forfeiture provisions within these contracts, arguing instead for a narrower reading which would allow some lands to remain with Northern Pacific Railway Company. In their view, this would better align with Congressional intent at the time these agreements were made.