321 CE
Birth of Valentinian I in Pannonia.
359 CE
April 18
April 18
Gratian is born in Sirmium to Valentinian I and Marina Severa.
364 CE
February 26
February 26
364 CE
March 28
March 28
Valentinian I selects his brother Valens as co-augustus.
365 CE
November 1
November 1
366 CE
Gratian appointed consul by his father, Valentinian.
367 CE
August 24
August 24
Valentinian raises his son Gratian to co-augustus.
368 CE
Valentinian and his son Gratian cross the Moenus River and scorch the territories of the Alamanni.
371 CE
Birth of Valentinian II to Justina and Valentinian I.
373 CE
Hostilities erupt between the Quadi and Valentinian I.
374 CE
Valentinian I is forced to make peace with the Alemannic chieftain Marcian.