Original sentence: There has been ongoing controversy due to allegations made by conspiracy theorists, and former armed forces personnel that some members of the Roosevelt administration had advance knowledge of the attack, and that this was purposefully ignored in order to gain public and Congressional support for America entering the war on the side of the British Empire and her allies
Edited sentence: There has been ongoing controversy due to allegations made by conspiracy theorists, military historians and former armed forces personnel that some members of the Roosevelt administration had advance knowledge of the attack, and that this was purposefully ignored in order to gain public and Congressional support for America entering the war on the side of the British Empire and her allies