sentences:  All of Lesbos, other than Methymna, took arms against Athens, but Lesbos lost ground upon the arrival of more Athenian troops.Mytilene became surrounded by Athenian fortifications and were isolated by land and sea.Finally, the Spartan Salaethus arrived and raised morale by reassuring the Mytilenians that the Peloponnesians were going to invade Attica and promised to supply them with a fleet in the spring.