After the Second Punic War (218–201 BC), the Romans acquired an overseas empire, which necessitated standing forces to fight lengthy wars of conquest and to garrison the newly gained provinces. Thus the army's character mutated from a temporary force based entirely on short-term conscription to a standing army in which the conscripts were supplemented by a large number of volunteers willing to serve for much longer than the legal six-year limit. These volunteers were mainly from the poorest social class, who did not have plots to tend at home and were attracted by the modest military pay and the prospect of a share of war booty. The minimum property requirement for service in the legions, which had been suspended during the Second Punic War, was effectively ignored from 201 BC onward in order to recruit sufficient volunteers.