People who secretly indulge in anti-national or anti-government activities and help the enemy are called

People who secretly indulge in anti-national or anti-government activities and help the enemy are called Fifth column. A fifth column is any group of people who undermine a larger group from within, usually in favor of an enemy group or nation. The activities of a fifth column can be overt or clandestine. Fifth column Refers to traitors or people who secretly indulge in anti-national or anti -government activities and help the enemy.