illi sanguine suo et lubrico paludum lapsantes excussis rectoribus disicere obvios, proterere iacentis.
Translation :
Staggering in their blood on the slippery marsh, they shook off their riders, driving hither and thither all in their way, and trampling on the fallen.
Edition :
Annales ab excessu divi Augusti. Cornelius Tacitus. Charles Dennis Fisher. Clarendon Press. Oxford. 1906.
Complete Works of Tacitus. Tacitus. Alfred John Church. William Jackson Brodribb. Sara Bryant. edited for Perseus. New York. : Random House, Inc. Random House, Inc. reprinted 1942.
Remark :
perpetrator: The horses had been attacked purposefully by Arminius and his men, described in: "Arminius with few men attacks confused Roman soldiers of Caecina and their horses."