is quite arbitrary, and cannot be explained satisfactorily. Chandragupta assumed the titles Bhattaraka and Maharajadhiraja, and bore the epithet Apratiratha ("having no equal or antagonist"). The Supiya stone pillar inscription, issued during the reign of his descendant Skandagupta, also calls him "Vikramaditya". Early life Chandragupta was a son of Samudragupta and queen Dattadevi, as attested by his own inscriptions. According to the official Gupta genealogy, Chandragupta succeeded his father on the Gupta throne. The Sanskrit play Devichandraguptam, combined with other evidence suggests that he had an elder brother named Ramagupta, who preceded him on the throne. In the play, Ramagupta decides to surrender his queen Dhruvadevi to a Shaka enemy when besieged, but Chandragupta goes to the enemy camp disguised as the queen and kills the enemy. Sometime later, Chandragupta dethrones Ramagupta, and becomes the new king. The historicity of this narrative is debated among modern historians, with some believing it to be based on true historical events, while others dismissing it as a work of fiction. Period of reign The Mathura pillar inscription of Chandragupta II (as well as some other Gupta inscriptions) mention two dates: several historians have assumed that one of these dates denotes the king's regnal year, while the other date denotes the year of the Gupta calendar era. However, Indologist Harry Falk in 2004 has theorised that the date understood to be the regnal year by the earlier scholars is actually a date of the kālānuvarttamāna system. According to Falk, the kālānuvarttamāna system is a continuation of the Kushana calendar era established by emperor Kanishka, whose coronation Falk dates to 127 CE. The Kushana era restarts counting after a hundred years (e.g. the year after 100 is 1, not 101). The date portion of the Mathura inscription reads (in IAST): candragupta-sya vijarajya-saṃvatsa[re] ... kālānuvarttamāna-saṃvatsare ekaṣaṣṭhe 60 ... [pra]thame śukla-divase paṃcāmyaṃ The letters before the words kālānuvarttamāna-saṃvatsare are abraded in the inscription, but historian D. R. Bhandarkar (1931–1932) reconstructed them as gupta, and translated the term gupta-kālānuvarttamāna-saṃvatsare as "year following the Gupta era". He translated the entire sentence as: "In the ... year of ... Chandragupta, ... on the fifth of the bright half of the first (Ashadha) of the year 61 following the Gupta era". Historian D. C. Sircar (1942) restored the missing letters as "[paṃ]cāme" ("fifth"), and concluded that the inscription was dated to the Chandragupta's fifth regnal year. The missing letters have alternatively