Show ancients used gas warfare the earliest use of 0 deleterious gases in siege warfare Is recorded in the history of the peloponnesian wars from to B C during this thia struggle between the athenians and spartans spartano Spar tans jurd their respective allies the cities ol of platea and nd dellum were besieged wood saturated with pitch and sulphur was set on fire alre and burned under the walls of these cities in order to generate choking and poisonous fumes aich would stupefy the defenders and render the task of the attacking forces less difficult |