by squadrons, by troops; by turma (squadron of 30 horsemen)
Latin word, found 12 times in the texts on Socratos.
Caesar, De Bello Gallico 8.18.2: Explorato hostium consilio nostri ad proeliandum animo atque armis parati, cum subsequentibus legionibus nullam dimicationem recusarent, turmatim in eum locum devenerunt.