English to French Other History Mongols

Contexte : histoire des Mongols et de leurs conquêtes au 13e siècle.

Organized into army groups 10 000 strong, the Mongol horsemen swept across Eurasia at a speed of up to 100 km a day. Most of them were archers, using their composite bows in hit-and-run warfare familiar to all steppe nomads [...]
Over time, the Mongol armies adapted to siege warfare and even naval operations, exploiting the skills of conquered peoples, Muslim and Chinese. But their political skills were never equal to the task of retaining the power won by their military prowess.

Problème de formulation, je n'arrive pas à sortir quelque chose de fluide. Merci d'avance