From the 879, Capua had been contested between several candidates, but, by 887, Atenulf had removed his brothers and cousins from contention and become sole prince with the assistance of the hypatus Athanasius of Naples.
Desde o 879, varios candidatos disputábanse Capua, pero, sobre 887, Atenulfo eliminara da contenda aos seus irmáns e curmáns e converteuse en príncipe único coa axuda do hypatos Atanasio de Nápoles.