Why do they use the federal courts and not civil?

Federal courts are often used for cases involving federal law, constitutional issues, or disputes between states or residents of different states, as they provide a uniform interpretation of federal statutes and the Constitution. Additionally, federal courts may be preferred for their perceived impartiality and expertise in complex legal issues. In contrast, civil courts typically handle state law matters, which may not address the broader implications of federal legal questions. As a result, parties seek federal courts to ensure their cases are heard under the appropriate jurisdiction.