During the 1870s, European initiatives against the Arab slave trade caused an economic crisis in northern Sudan, precipitating increasing unrest. Relations between Egypt and Abyssinia (later renamed Ethiopia) had become strained due to a dispute over the district of Bogos, and war broke out in 1875. An Egyptian expedition was completely defeated near Gundet. A second and larger expedition under Prince Hassan was sent the following year and was routed at Gura. Matters then remained quiet until March 1877, when Gordon proceeded to Massawa, hoping to make peace with the Abyssinians. He went up to Bogos and wrote to the king proposing terms. He received no reply as the king had gone southwards to fight with the Shoa. Gordon, seeing that the Abyssinian difficulty could wait, proceeded to Khartoum.