Worth remembering that out of the BEF's Ist Cavalry Division's 5 brigades and 3 regiments per brigade ie 15 regiments in total- 4 were Lancer Regiments. Lots of postcards and illustrations of this period Aug/Sept 1914 showing the British and Germans pig-sticking each other.
"On 29 August 1914, C Squadron* of the 12th Lancers made a successful charge against a dismounted squadron of Prussian Dragoons."
"In a rare old-fashioned cavalry charge, the British 12th Lancers ride down and spear German Uhlans at Cerizy "
"The Germans, too, in 1914, got a taste of the same medicine. At Cerizy during the retreat the 12th Lancers got into a force of German cavalry, whose horses had been stampeded, and speared 70 or 80 of the enemy, who proved to be of the 2nd Guard Dragoon Regiment." 1928 the Canberra Times
no two accounts the same.
Probably easier to sort out whether the Romans had bendy or straight shields- remember?