Answer:
-Kentucky
-Maryland
-Missouri
-Delaware
-West Virginia
Explanation:
Kentucky - President Abraham Lincoln considered Kentucky's loyalty to the Union as an important factor in the Union winning the Civil War. Kentucky began the war as a neutral state, but later came under Union control.
Maryland - Maryland was also very important for the Union. The land of Maryland was the only thing standing between Virginia and the Union capital at Washington D.C. The war would have gone very differently had Maryland seceded from the Union. Maryland voted to abolish slavery during the war in 1864.
Missouri - At the start of the war Missouri decided to remain with the Union and not secede, but many people in the state felt that the war against the Confederacy was wrong. As the war progressed, the Missouri state government split into two rival governments. One of the state governments voted to secede from the Union while the other wanted to stay. As a result, the state was claimed by both the Union and the Confederacy for a period of time.
Delaware - Although Delaware was a slave state, few people in the state owned slaves at the outbreak of the war. The state didn't actually border any Confederate states and was always loyal to the Union.
West Virginia - When the state of Virginia seceded from the Union, West Virginia broke away and formed its own state. It remained loyal to the Union, however, the people of West Virginia were split. Around 20,000 West Virginia men fought on the side of the Confederacy.
