The Eight Books of Thucydides' History, translated by R. Crawley.
Chapter XII : Seventh Year of the War—Occupation of Pylos—Surrender of the Spartan Army in Sphacteria
Chapter XIII : Seventh and Eighth Years of the War—End of Corcyraean Revolution— Peace of Gela—Capture of Nisaea
Chapter XIV : Eighth and Ninth Years of the War—Invasion of Boeotia—Fall of Amphipolis—Brilliant Successes of Brasidas
Seventh Year of the War—Occupation of Pylos—Surrender of the Spartan Army in Sphacteria
Next summer, about the time of the corn's coming into ear, ten Syracusan and as many Locrian vessels sailed to Messina, in Sicily, and occupied the town upon the invitation of the inhabitants; and Messina revolted from the Athenians. The Syracusans contrived this chiefly because they saw that the place afforded an approach to Sicily, and feared that the Athenians might hereafter use it as a base for attacking them with a larger force; the Locrians because they wished to carry on hostilities from both sides of the strait and to reduce their enemies, the people of Rhegium. Meanwhile, the Locrians had invaded the Rhegian territory with all their forces, to prevent their succouring Messina, and also at the instance of some exiles from Rhegium who were with them; the long factions by which that town had been torn rendering it for the moment incapable of resistance, and thus furnishing an additional temptation to the invaders. After devastating the country the Locrian land forces retired, their ships remaining to guard Messina, while others were being manned for the same destination to carry on the war from thence.
Reference address : https://www.ellopos.net/elpenor/greek-texts/ancient-greece/thucydides/history-4.asp?pg=1