 
 <prompt> Wetin be di last branch of di military wey dem mention? Based on di last question, write one context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: The Roman Empire bin reach im biggest size during the 2nd century AD; the next two centuries see as Roman control over their far territories dey reduce. Economic wahala, wey include inflation, and pressure from outside for the frontiers join hand to make the 3rd century dey politically shaky, as emperors dey come throne just to quickly dey replaced by new usurpers. Military expenses dey increase steadily during the 3rd century, mainly because of the war with Sassanid Persia, wey come back to life for the middle of the 3rd century. The army double in size, and cavalry and smaller units replace the legion as the main tactical unit. The need for money lead to increase for taxes and a decrease in the number of the curial, or landowning, class, and the number of people wey dey ready to carry the responsibilities of holding office for their hometown dey reduce. More bureaucrats dey needed for the central administration to handle the needs of the army, wey lead to complaints from civilians say there dey more tax-collectors for the empire pass tax-payers. 