The county legislative bodies are authorized to appropriate, by a roll call and recorded vote, from their respective county treasuries, money to be expended solely in the erection of permanent monuments or buildings or libraries or any other evidence of appreciation of the bravery and valor of soldiers, sailors, and marines, within the respective counties appropriating the same, but not from any special fund heretofore provided by law, to the honor and memory of the living and dead American soldiers, sailors, and marines, collectively, who served in World War I, II, or the War Between the States, but it is expressly provided that no sum in excess of thirty thousand dollars ($30,000) shall be appropriated by any one (1) county for such purpose.