When Germanicus died at Antioch in 19 AD, his mother Agrippina the Elder returned to Rome with her six children. She had a bitter feud with Tiberius. That eventually led to the destruction of her family. Caligula was the only male survivor. In 31, he joined the emperor on the island of Capri. Tiberius had gone there five years earlier. When Tiberius died in 37, Caligula became emperor.