Most of the land is shit desert with little to no rain
Deserts are the superior biome, it’s the easiest and most stable life, if you have rain captureing systems and managed wells for your date palm orchards you uses for carbs to avert hunger and even feed laborers, military, etcs ; camels and small ruminates dairy production and flesh for your protein
All the “food” that grows in tropical and warm climates are low quality anyways that are either deficient in essential amino acids pseudo protein like beans lentils pulses etc
vegetables you have to break your back every year to grow that are not even mineral or ash rich as date or milk
also hot weather gives cows heat strokes only climate nearly as good as deserts are cold and highlands as they can grow grains like wheat, barley; and cattle produce more milk
Defense wise we’re way more safe and secure Alhamdulilah that’s why Gaalo are all over the south and the north can control its migrants