German U-boats taking down any non-german ships. civilian or commercial.didnt matter.
The answer is the light bulb.
Answer:
Plessy v. Ferguson was important because it essentially established the constitutionality of racial segregation. As a controlling legal precedent, it prevented constitutional challenges to racial segregation for more than half a century until it was finally overturned by the U.S. Supreme Court in Brownv.
Explanation:
