Final answer:
The statement is False. The southern states provided units of men to serve in the Confederate army during the American Civil War.
Step-by-step explanation:
The statement is False. Nearly all southern states did not provide one unit of men to serve in the Union army. The southern states seceded from the Union during the American Civil War and formed the Confederate States of America. They provided units of men to serve in the Confederate army.
Learn more about Participation of southern states in the Union and Confederate armies during the American Civil War