It first became an issue in the U.S. after the Civil War. Many felt that the trademark value of the American flag was threatened on at least two fronts in the years immediately following the Civil War: once by the preference of white Southerners for the Confederate flag, and again by the tendency of businesses to use the American flag as a standard advertising logo. Hope, you will find it helpful. In case, it is different from what you need, check it at PrimeWritings. I absolutely love them.
Answer it's prepositional
