Short answers, pulled from the story.
Odoacer emerged as the leader of the disaffected Herulian forces during their uprising. He commanded the confederates who flocked to his standard after rejecting land division demands.
The decisive battle took place on the 2nd of September 476 near Ravenna. This conflict saw the foederati defeat the largely depleted Roman garrison defending the city.
Romulus Augustulus was forced to abdicate by Odoacer two days after the battle. The sixteen-year-old emperor was sent into retirement in Campania following this event.
Herulians insisted on receiving one-third of Italian lands because they envied the independent inheritance acquired by their brethren in Gaul, Spain, and Africa. Their demand represented a direct challenge to imperial authority over Italian soil.
Paulus, the brother of Orestes, defended the city of Ravenna against the attacking forces. The city was captured swiftly and easily by the rebel army led by Odoacer.