After the Battle between Zarkon and the Paladins Of Voltron they found out Zarkon had a son named Lotor and a few months into that battle Lotor joined with the Paladins of Voltron now they are talking about how to take the Throne

Allura: "So how do we plan to get to the Kral Zera?"

Pidge: "Ya, it's well, Galra territory."

Keith: "It's nearly impossible."

Lance: "Ya, it's not like we can just walk in."

Hunk: "What is a Kral Zera?"

Shiro: "Nothing is impossible for Voltron."

Lotor: "If I may be allowed to show you all, I would love to tell you all."

Coran: "Are you sure?"

Lotor: "First, we have Commander Vladnock. My father's most trusted Commander, then we have Commander Ragmonck, She's in charge of the galra weapons, then Commander Trugg. She's in charge of the galra shipping lanes

Pidge: "She's been showing up in my systems a lot she definitely color codes."

Lotor: "Then finally... Haggar, my father's witch since she's not Galra, she can't lead the empire she'll most likely have a puppet, or she already has one..."