Landenulf I was briefly

Count of Capua This is a list of the rulers of the Principality of Capua. Lombard rulers of Capua Gastalds and counts The gastalds (or counts) of Capua were vassals of the princes of Benevento until the early 840s, when Gastald Landulf began to clamour for the ...

after the death of his brother Lando III in 885. He was a son of Landenulf,

gastald A gastald (Latin ''gastaldus'' or ''castaldus''; Italian ''gastaldo'' or ''guastaldo'') was a Lombard official in charge of some portion of the royal demesne (a gastaldate, ''gastaldia'' or ''castaldia'') with civil, martial, and judicial powers. ...

Teano Teano ( Teanese: ) is a town and ''comune'' in the province of Caserta, Campania, southern Italy, northwest of Caserta on the main line to Rome from Naples. It stands at the southeast foot of an extinct volcano, Rocca Monfina. Its St. Clement's ...

, and grandson of

Landulf I of Capua Landulf I (c. 795 – 843), called the Old, was the first gastald of Capua of his illustrious family, which would rule Capua until 1058. According to the ''Cronaca della dinastia di Capua'', he ruled in Old Capua for twenty five years and four mo ...

. He kept his deposed cousin Pandenulf in prison. His entire reign was spent defending himself against the Greeks, led by

Athanasius of Naples Athanasius (died 898) was the Bishop (as Athanasius II) and Duke of Naples from 878 to his death. He was the son of Gregory III and brother of Sergius II, whom he blinded and deposed in order to seize the throne while he was already bishop. In ...

and the strategos of Bari. The latter sent 300 soldiers under the command of Chasanos, who was recalled to

Constantinople la, Constantinopolis ota, قسطنطينيه , alternate_name = Byzantion (earlier Greek name), Nova Roma ("New Rome"), Miklagard/Miklagarth (Old Norse), Tsargrad ( Slavic), Qustantiniya (Arabic), Basileuousa ("Queen of Cities"), Megalopolis (" ...

, and succeeded by Joannikios.

Guaimar I of Salerno Guaimar I (also ''Waimar'', ''Gaimar'', or ''Guaimario'') (c. 855 – 901) was the prince of Salerno from 880, when his father entered the monastery of Monte Cassino in August. His parents were Prince Guaifer and Landelaica, daughter of Lando I of ...

was convinced to enter the war on the side of Landenulf, while Landenulf's brother Atenulf had joined the Greeks. Joannikios pillaged Capua and succeeded in liberating Pandenulf, but Atenulf was the victor, displacing his beleaguered cousin and setting himself up as sole Capuan count in January 887.

Sources

Erchempert Erchempert ( la, Erchempertus) was a Benedictine monk of the Abbey of Monte Cassino in Italy in the final quarter of the ninth century. He chronicled a history of the Lombard Principality of Benevento, in the '' Langobardia Minor'', giving an espec ...

''Historia Langabardorvm Beneventarnorvm''
at

The Latin Library The Latin Library is a website that collects public domain Latin texts. It is run by William L. Carey, adjunct professor of Latin and Roman Law at George Mason University. The texts have been drawn from different sources, are not intended for rese ...

. *Caravale, Mario (ed). ''Dizionario Biografico degli Italiani: LXIII Labroca – Laterza''.

Rome , established_title = Founded , established_date = 753 BC , founder = King Romulus (legendary) , image_map = Map of comune of Rome (metropolitan city of Capital Rome, region Lazio, Italy).svg , map_caption ...

, 2004. Landenulf 1 Lombard warriors 9th-century Lombard people 9th-century rulers in Europe {{Italy-noble-stub