Which sacrifice did Samudragupta perform to celebrate his victories, and which deity did he primarily worship?

Samudragupta celebrated sovereignty through the Ashvamedha sacrifice and issued commemorative coins; his records and Garuda symbolism show his devotion to Vishnu. This question belongs to the Gupta and post-Gupta phase, a period reconstructed through inscriptions, coins, monuments, literary works, scientific texts and accounts of foreign travellers. A reliable answer must connect the named ruler, author, work, institution, title or event with the correct chronology and source. The Gupta age is often described as a classical or golden age because of important achievements in Sanskrit literature, temple architecture, sculpture, astronomy and mathematics, but the label should not conceal regional diversity or social and political change. Contemporary inscriptions and coins are especially useful for royal genealogy, conquests, offices, titles and religious affiliation.