Short answers, pulled from the story.
Septimius Severus was Roman emperor from 193 to 211. He was born on the 11th of April 145 in Leptis Magna, in the Roman province of Africa, and died on the 4th of February 211 in Eboracum, modern York. He is considered the first emperor born into a provincial family of non-Italian origin.
Septimius Severus was born in Leptis Magna, in present-day Libya, on the 11th of April 145. He came from a family of equestrian rank; his father's family was of Libyan-Punic origin, while his mother descended from the Italian Fulvii, a patrician family from Tusculum. He was a native Punic speaker who also spoke Latin and Greek.
Severus was proclaimed emperor by his legion XIV Gemina at Carnuntum on the 9th of April 193, following the murder of the emperor Pertinax. He marched on Rome, where the Senate had already condemned Pertinax's successor Didius Julianus to death. After entering Rome unopposed, Severus defeated his two rival claimants, Pescennius Niger at the Battle of Issus in 194 and Clodius Albinus at the Battle of Lugdunum on the 19th of February 197.
Severus waged wars on multiple frontiers. He defeated the Parthian Empire and sacked their capital Ctesiphon in 197, annexing northern Mesopotamia. In 202, he campaigned in Africa against the Garamantes, capturing their capital Garama, over 600 kilometres south of Leptis Magna. In 208 he invaded Caledonia, modern Scotland, strengthening Hadrian's Wall and advancing to the extremity of the island before his death in 211.
Severus reduced the silver purity of the denarius repeatedly to fund his expanded military. He cut purity from 81.5% to 78.5% on his accession, then dropped it to 64.5% the following year, and by 196 had reduced it further to 54% with a silver weight of only 1.82 grams. Scholars describe this as the largest debasement of Roman currency since the reign of Nero.
Julia Domna was the second wife of Septimius Severus and a Syrian from Emesa whose father served as high priest of the sun god Elagabal. Severus valued her counsel and she earned a reputation for letters and philosophy. After the execution of the praetorian prefect Plautianus in January 205, Severus relied more openly on her advice, and after his death she advised his two sons who succeeded him.