My throwaway TC cat, Leapingtree, will be traveling near the ShadowClan border one night when they overhear a couple of ShadowClan cats conversing. Interested, Leapingtree climbs a tree to listen in on their conversation. He overhears something very interesting, indeed: WindClan and ShadowClan are now allies.

This horrifies the paranoid, reckless tom, who jumps to the conclusion that WindClan and ShadowClan are secretly plotting a joint attack on ThunderClan, and possibly RiverClan. He comes to the conclusion that an alliance between ThunderClan and RiverClan is the only appropriate response, but knows that he likely won't be able to get Bumblestar to agree to it given the currently tense relations between ThunderClan and RiverClan.

So, Leapingtree decides to go behind Bumblestar's back. He organizes a small group of supporters, informing them of the alliance. He comes up with the idea for a joint ThunderClan-RiverClan patrol to attack either a ShadowClan or WindClan patrol, as a show of unity and strength.

Leapingtree, being the reckless cat he is, approaches the first RiverClan cat he sees at the border with this idea. They agree to it, especially after being reminded of Dawnstar's takeover of ThunderClan and the threat of that happening now to both ThunderClan and RiverClan. They agree that Bumble and Lark should stay in the dark about it, since they'd both probably just nip the whole thing in the bud.

The RiverClan cat organizes their own group of supporters. On an arranged day, the two patrols meet in the outskirts and travel to the ShadowClan-WindClan border. They attack the first patrol they see- a ShadowClan patrol. Not long after, a WindClan patrol, seeing what's occurring and realizing that both ThunderClan and RiverClan are fighting, decides to join to defend ShadowClan. A few more ShadowClan and WindClan cats join soon after. This gives us a four Clan border fight.