The Ann Caroline was a Supreme Court case that revolved around the issue of whether or not an owner of a vessel could be held liable for damages caused by their negligence. The plaintiff, who had been injured while working on the defendant's ship, argued that they were entitled to compensation from the defendant due to his negligent actions in failing to provide proper safety equipment and supervision. The court ultimately found in favor of the plaintiff, ruling that owners are responsible for any damage resulting from their own negligence and must pay appropriate compensation when such harm occurs. This decision established an important precedent regarding maritime law and set forth clear guidelines as to how liability should be determined in cases involving vessels owned by private individuals or companies.

In The Ann Caroline, the Supreme Court was tasked with determining whether a vessel that had been seized by Confederate forces during the Civil War could be considered a lawful prize of war. The majority opinion held that since the vessel had been captured in an area where hostilities were taking place and it was not under any foreign flag or protection, it could be lawfully taken as a prize of war. Justice Field dissented from this opinion on two grounds: firstly, he argued that there must have been some evidence presented to show that the vessel belonged to someone who supported either side in order for it to be considered a lawful prize; secondly, he argued that even if such evidence existed, Congress would still need to pass legislation specifically authorizing its seizure before it could legally become part of either side's spoils of war. In conclusion, Justice Field believed there was insufficient proof presented at trial for the court to determine whether or not The Ann Caroline should rightfully belong as part of one side's spoils and thus concluded his dissent from the majority opinion.