Complex sentence: The great Dungan revolt (1862--1877), or insurrection various Muslim ethnic groups, which broke out in 1862 in Gansu, spread rapidly to Dzungaria and through the line of towns in the Tarim Basin.
Split into simpler sentences: The great Dungan revolt (1862--1877) involved insurrection among various Muslim ethnic groups. It broke out in 1862 in Gansu then spread rapidly to Dzungaria and through the line of towns in the Tarim Basin.