Taxis drove slowly through the streets of Paris on Sunday, but not for any kind of protest. They were following eight historical taxis that took French soldiers from Paris to the front line of the Battle of the Marne in 1914. Some 100 present-day cabdrivers retraced the route taken out of Paris by the 600 taxis in 1914, to commemorate what have been called the 'Taxis of the Marne'.