PK-series worker droids are used by the Trade Federation and the CIS for maintenance and battlefield cleanup operations. It's thanks to these little guys if a fallen battle droid can still hope
Star Wars - Droid Invasion/Trade Federation March Suite (Theme) - YouTube
What is the size of the entire Trade Federation in the total amount of ships and droids in The Phantom Menace? - Quora
Trade Federation Droid Bomber By Blazbaros by arcane37 on DeviantArt