Literally the title. They still are very strong when fighting 1-on-1 combat vs my troops. (I am Harad) But every time I kill an army of Gondor with over 1k+ troops a new one spawns out of nowhere. Then they attack again and again and again. They multiply their troops like they are orcs. It never ends. I sent a spy near minas tirith and there it is - a full stack army of Gondor, then I sent a diplomat to the left on the coast and there are 3 half-stacked armies. All the while my most south settlement is under attack by a - you guessed it - full stack Gondor army! How do they produce so much units so quickly and how can I deal with the constant aggression?