The forces who beat the British at Concord were not disorganized. Every town militia met regularly for drill, and had elected officers. Moreover they were backed by a corps of Minute Men, who were trained to the level of professional soldiers. They had a unified regional command structure and political organization that became the nucleus of the Continental Army.
My ancestor who was 70 years old at the Battle of Bunker Hill was with no unit. He came 40 miles with his son to blast the British -son was in no unit. Their in-law Prescott was the only member of the family in a military unit.
My 7 ancestors at the Battle of Saratoga II were farmers with no units-= They just rushed to Saratoga with their pitchforks and muskets coz they heard they Johnny was stuck in a rut and his Hessians rear guards got their butts beat by ragtags.
My ancestors who were seniors picked off the British on their way back from Concord on road ambushes- they were with no military units, just farmers who could make a squirrel lose his nuts at 200 yards `n nothin else.
Better go `n read your genealogies and family bibles and them DAR books.