His 30,000 men [losing 10,000 killed and 10,000 wounded]

Rome managed to reconquer Sicily, and it was defeating Carthage in Iberia, at the Battle of Baeti in 211 and at Baecula in 2008. At Baecula the Romans had 30,000 men under a brilliant general: Scipio. Carthage had 25,000 men, most of them were Gauls, led by Hannibal's younger brother by two years: Hasdrubal. After the battle, Hasdrubal led his depleted force over the Pyrenees into Gaul and then into Italy, looking to join forces with his brother. He was defeated on the Italian peninsula's northeast coast, at Metaurus, his 30,000 men losing 10,000 killed and 10,000 wounded according to the historian Polybius. Hasdrubal was beheaded and his head rolled into Hannibal's encampment in the south of the penninsula.
[Punic War II – Hannibal's War http://www.fsmitha.com/h1/rome06.htm]

I'd like to know if "10,000 killed and 10,000 wounded" is a complement of "losing."
Thank you in advance for your help