Final answer:
The branch insignia on the male Enlisted Army Blue Service uniform is positioned on the left collar, centered 1 inch up from the notch, with the centerline of the insignia parallel to the inside edge of the lapel.
Step-by-step explanation:
The branch insignia on the male Enlisted Army Blue Service uniform is worn on the left collar. The insignia should be centered on the collar, 1 inch up from the notch, with the centerline of the insignia parallel to the inside edge of the lapel. The insignia itself is distinct for each branch, for example, infantry is represented by crossed rifles, and armor by crossed sabers. It is important that service members adhere to the uniform standards of the United States Army to maintain a professional and disciplined appearance.