This campaign would be an asymmetric one, which is why it’s not really in the running as the starter campaign. Like the Cebidae Exchange, it has neat ideas that make it less accessible to someone who’s still trying to figure out how campaign rules even work, but in this case even more so, because each of the two players has to grapple with a different set of rules.
The idea in the Pan Insurrection is that a bunch of chimps have taken over a region traditionally under the aegis of the gorillas, who are mounting an expedition to reclaim it. The gorillas just plain get more armies and have more scrap to spend on them, but the Pan Clan begins with total control of the entire map except for the hexes the gorillas start out on (and the wilderness hexes that make up most of any campaign map, which cannot be controlled by any side), and they move in secret. Each turn, the Pan Clan writes down which army has moved to which hexes. When the Gorilini Clan arrives in a hex, they can try to track them, and the Pan Clan must share if one of their armies has been in the area within the last three turns, and if so, how many turns ago it was and which direction they left in. If the Gorilini Clan tracks in a hex and discovers a Pan Clan army in that hex, they can attack, and will likely have the chimps outmatched. If the Gorilini Clan discovers the Pan Clan has been here within the last turn, that army’s current location is revealed. On the other hand, if the Pan Clan catches a Gorilini Clan army who aren’t currently tracking any Pan Clan armies, they can ambush the gorillas.
The Pan Clan can try to rally around valuable hexes near the gorillas entry points and hold them, preventing gorillas from gaining any scrap income while keeping their own high enough to hopefully offset losses and keep their armies functional long enough to grind the gorillas down. Alternatively, they could leave the towns alone and instead try to ambush the gorillas outside them, then use the terrain advantage of an ambush scenario to get favorable K:D ratios and even the odds that way. The gorillas are likewise faced with the option of trying to secure towns, which gives them very predictable movement patterns that chimps will easily be able to position themselves to ambush, or else move out into the wilderness and try to track the chimp armies and destroy them before their superior scrap income allows them to fight on even footing.
I’m not sure if this would be as much fun in practice as it sounds in my head, mainly because the chimps’ hidden movement mechanic might not work very well in practice. Additionally, the premise would require that each side have limited or entirely prohibited access to chimps or gorillas. There’s over a dozen clans, so losing access to just one of them probably won’t be a huge deal for either side, but it’s hard to say that for sure with almost no playtesting and the first draft rules not quite complete.