BBY/ABY is used to position items along the Star Wars Timeline. BBY refers to Before the Battle of Yavin. ABY refers to After the Battle of Yavin. The Battle of Yavin in Episode IV: A New Hope occured in 0 BBY/ABY.
This three-issue series is a good example of a Prequel-era story of a Master/Padawan Jedi team tasked with a specific mission on a hostile planet. These mostly exist prior to the Clone Wars and are representative of Obi-Wan’s words, “For over a thousand generations, the Jedi Knights were the guardians of peace and justice in the Old Republic. Before the dark times, before the Empire.”
Last stand on Old Mantell takes the duo to Order Mantell, a lawless industrial planet also visited in the classic Brian Daley audio drama. They are in search of a missing ship and before their quest is over they must face off against slavers.
When a valuable cargo freighter fails to reach its destination on the planet Coruscant, Qui-Gon and Obi-Wan are sent into deep space to search for the missing ship. Their investigation leads them to the distant, lawless world of Ord Mantell, where everyone carries a grudge and a blaster... and Jedi are less than welcome.