Why did free african americans need certificates of freedom?

Free Black people still faced danger. Many appeared in court to ask for a Certificate of Freedom. The claimant had to prove that he/she was born free or had been previously freed. If the court was satisfied, it would issue a certificate with a minute description of the person including skin shades, hair texture, and body scars. Freedom papers were essential for freedmen who wanted to travel, particularly those working on the rivers.

Explanation:

although world war i began in 1914, the united states did not join the war until 1917. the additional firepower, resources, and soldiers of the u.s. to tip the balance of the war in favor of the allies. remaining neutral. when war broke out in 1914, the united states had a policy of neutrality.

pennsylvania, new hampshire, massachusetts, connecticut and rhode island .