Final answer:
Broadwell v. Illinois refers to Presser v. Illinois, a Supreme Court case that upheld an Illinois law prohibiting private military organizations.
Step-by-step explanation:
Broadwell v. Illinois refers to a legal case that has not been specifically mentioned in the question. However, the information provided in the reference suggests that the question might be referring to Presser v. Illinois, a Supreme Court case decided in 1886.
In Presser v. Illinois, the Supreme Court upheld an Illinois law that banned common citizens from creating personal military organizations, conducting drills, and parading. The Court ruled that the law did not infringe on the right to keep and bear arms.
This landmark case established that a state can prohibit private paramilitary groups from organizing and training without violating the Second Amendment of the U.S. Constitution. It confirms the authority of states to regulate militias and ensure public safety.