The campaign known as the Rise of the Cortosis Battle Droids unfolded when the Confederacy of Independent Systems started producing battle droids incorporating cortosis, a material capable of withstanding lightsaber attacks. The campaign concluded with the obliteration of the C-B3 cortosis battle droid production facility located on Metalorn.
This campaign encompassed various engagements and operations, notably a Mission to Tatooine, the Coruscant Insurrection, a Duel in Bentho's Nightclub and a mission that targeted the world of Metalorn.
Initially, The New Essential Chronology placed Star Wars: The New Droid Army seven months following the Clone Wars' commencement; however, the episode "Heroes on Both Sides," taking place in 20 BBY, subsequently clarified that Coruscant remained unassaulted until the events depicted in that episode, thereby shifting The New Droid Army later within the timeline.