Estobanse Province, was the richest land of the Kolanse, thriving on springs. The southern kingdoms suffered from droughts, however. Overfarming of thin topsoil led to spreading desertification that left Kolanse teetering on the edge of starvation.
Several decades before the start of the Malazan Book of the Fallen, Kolanse had experienced a series of cyclically expansionist regimes which drove the tribes of Lether's plains westward against the frontier of the Letherii Empire. Following a civil war, Kolanse retreated into isolation.