Civil War Brooklyn soldiers demanded distinction from New York

One hundred fifty years before there was a technology community and three decades before consolidating into the City of New York, there was a Brooklyn identity insisted upon by its Civil War regiments.

From Gettysburg: the Last Invasion:

“The colors of the 14th Brooklyn… regimental flags were carried into battle in the Civil War to serve as markers and rallying points in the midst of battlefield noise that overpowered officers’ voice commands and thick banks of powder smoke that sharply limited visibility. The 14th Brooklyn was actually the 84th New York Volunteer Infantry, but most of the regiment had originally been members of the 14th New York State Militia, based in Brooklyn, and they insisted on identifying themselves by their old militia designation.