How did the union benefit from holding maryland?

maryland had a well-trained militia and officers

maryland had more railroads than any other state at the time

the confederate capital was bordered by union territory

the union capital was not surrounded by hostile territory

The Union benefited from holding Maryland with Washington DC being not surrounded by hostile territory.

Explanation:

In 1861 the Civil War began. The population of the state of Maryland was divided. Many wanted the secession of the state from the Union and the incorporation to the newly formed Confederate States of America. Others, for their part, wanted the state to remain in the Union.

The Union did not wait for Maryland to decide whether to join the Confederacy or not. This, because Virginia was one of those who did. If Maryland had done the same, the capital, Washington DC, located between the two states, would have been completely surrounded by the Confederation. For that reason, the Union invaded it immediately after the beginning of the war, and for that reason participated in the fight as a state of the North. However, many of his men fled and joined the Confederate troops.

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