Short answers, pulled from the story.
Honorius was Western Roman Emperor from 393 to 423. He was born on the 9th of September 384 in Constantinople, the younger son of Theodosius I, and became emperor at the age of ten after his father died in January 395.
Rome was sacked by the Visigoths under Alaric in 410 after Honorius refused to negotiate following the fall of the rival emperor Attalus and declared Alaric the eternal enemy of the Republic. The city had been under intermittent siege since Stilicho's execution in 408, and Honorius's refusal to reach a settlement left the starving city unable to hold out.
Stilicho served as the effective military protector of Honorius throughout the early reign, appointed by Theodosius I and of mixed Vandal and Roman ancestry. He defended Italy against Alaric at Pollentia in 402 and against Radagaisus in 406, but was arrested and executed on Honorius's orders in 408 after a minister named Olympius convinced the emperor that Stilicho was conspiring with the barbarians.
The Rescript of Honorius was issued in 410 in response to British pleas for military help against barbarian incursions. According to the sixth-century scholar Zosimus, Honorius wrote to the cities of Britain telling them to guard themselves. Some modern scholars argue the letter was actually addressed to Bruttium in southern Italy, not Britain, based on its context in Zosimus.
Honorius banned gladiatorial games twice, in 399 and again in 404, reportedly because a Christian monk named Telemachus was killed by spectators while protesting a match. The last known gladiatorial games in Rome took place during his reign.
Honorius died of edema on the 15th of August 423, leaving no heir. After a brief interregnum during which Joannes was proclaimed emperor, the Eastern Emperor Theodosius II installed Valentinian III, son of Galla Placidia and Constantius III, as Western Roman Emperor.