Lamar Advertising recently removed a "Secede" billboard from Interstate 85 in Montgomery, Ala., after complaints.
Michael Hill, president of the Confederate League of the South, told the Associated Press that the group's billboard went up last Friday, but was taken down over the weekend.
Before it went down, YouTuber John Preston made a video (below) of the billboard.
Hill says his organization is trying to get Lamar Advertising to restore the billboard, which offended other advertisers who threatened to boycott the ad company.
Hill claims his group ran the same billboard ad with Lamar Advertising for two months Tallahassee, Fla., despite public opposition.
"We had a really, really good open public debate about this issue in Tallahassee," Hill told AL.com. "Nobody got their pants in a wad about it. The message is not offensive, it's not immoral or unethical."
"Is this America, or is it Stalin's Russia where you shut down any opposition and dissent?" added Hill, who failed to mention any government censorship of the sign.
The Confederate League of the South has called for Southern states to secede from the U.S. since 1994.
The Southern Poverty Law Center has categorized the organization a hate group.