The North was called the Union because it represented those states that remained in "union" together as the Unites States, and because it was fighting to preserve that union by keeping the rebellious Southern states from leaving it.
Your face, i am the union
Probably most of the states were represented there. It was the Army of Northern Virginia (Confederate) under Lee against the Army of the Potomac (Union) under the newly-promoted Meade. It was a Union victory.
they are represented by an elected chairman
The Union in the American Civil War represented the free states (meaning slave-free states) plus five border slave states in the north of America. The Confederate States of America (the Confederacy) comprised the eleven southern slave states which had seceded from the United States of America.
Because with their size, population and importance to the Nation, they deserved to be represented as full partners in the affairs of the United States.
The union of the states
The state of New York is represented by two Senators. Each state in the union is represented by two Senators. 50 states equals 100 senators.
there were 12 states that were represented in the constitutional convention
Davis represented Mississippi and that was a Confederate state and the second state to secede from the Union.
The Articles created a league of free and independent states with a limited national government. In 1776, they represented the first agreement among the separate colonies to become a union of states.
American Federation of Labor national trade union represented the skilled workers.ANS 2 - There have been hundreds of national trade unions that represented skilled workers. The AFL was not actually a Union, but a Federation of different Unions.