The party almost bit off more than they could chew, but got really lucky.
I should talk about the horse swapping and gossip first.
The goblins have been raiding the kobolds, trying to bottle them up in their cave. During one raid, Solvo the thief and Lauren the ranger tailed the goblins and got a good look at the entrance to the kobold's lair. There were some injured kobolds and goblins, but no deaths.
As Solvo and Lauren made their way back they were followed by a half dozen goblins and all of the kobold warriors. The rest of the party fired a couple of arrows at the kobolds which routed them. No deaths, but it caused a meeting between the goblin warband leader, Brekan and the party. The goblins find their new neighbors to be useful for the moment. That and the leader, Brekan was impressed by the gift of a puppy the party bestowed on him.
Next, I have named the leaders of the orc tribes. The orcs in B are lead by Ostro and the orcs in cave C are lead by Vis. Ostro's orcs were soundly beaten by the party when they raided the goblin caves. Vis and Ostro met. Ostro wanted to see if the two tribes could reach an agreement to combine forces against the party and the goblins. Vis suggested that all of the women folk come to his cave and Ostro should drop dead. Ostro attempted to press the negotiation, with a punch but Vis was unimpressed and became more hostile.
The party delivered some instant Karma on Vis. The party is confused about where the orcs are coming from and believe that all of them are in cave C, Vis's tribal home. They are completely wrong, they fought off Ostro's orcs in the goblin caves. They don't realize there is another cave B of to the east. (Vis is the western leader and Ostro is the eastern leader, just like the Goths.)
Anyway, the heroes gathered up their wargear and mounted an offensive on Vis's cave. They even brought the dogs. However, nothing went smoothly.
Solvo had the net trap fall on him, but the dogs surged over the top of it. The party was surprised by crossbow fire because I decided there was an orc with a crossbow in each main room due to the heightened alert status of the tribe. The dogs and a few arrows made short work of the orcish crossbow men. What the party didn't know was the dogs only attacked active combatants, and many of the orcs hid or froze at the sight of the dogs. When the party passed, they ran from entrance C to entrance B.
Vis and Ostro heard the commotion and jointly pushed the party back. The party got pinned between the guard in area 16 and the orcish leaders coming through the secret door. As the party took down the guard behind them, the orcish leaders sensed that the battle was going poorly and retreated. Aleric, Solvo and Helvani nearly died pursing them in Ostro's cave system (B).
The goblins and the kobolds noticed all of the mayhem and attacked the entrance to cave B. They were easily driven off because the whole thing devolved into a 4 way battle between two different groups of orcs, the kobolds and the goblins. Again, no deaths. In case you haven't noticed, I don't roll dice for stuff the party isn't a part of.
The party now controls all of the areas in green. They have seen areas marked in orange. Brekan and the goblins are glad to help the party move further from their home. Brekan would really like to drive out the kobolds, but believes he needs more dogs and crossbows to do it.
The kobolds also have plans. Kregg, their leader has put his tribe to work mining out a small exit from his room. It's really close to the Orcs in area B, but he doesn't care. He plans to hoof it if they get hit again. They will probably escape into the wilds and return when things die down.
Vis and Ostro have barricaded the eastern most secret door.
The party engaged in healing, as per their usually lack of care. They healed the dogs first leaving everyone except Belaphon pretty banged up. They almost paid for it when Solvo investigated room 13 and found the money and the centipedes. Aleric and Vandohl heard the ruckas and saved him.
A little while later, Vis and Ostro peeked in on the heroes and decided not to press their luck against the dogs, Vandohl and Belaphon. Being fearsome orc leaders, they sent in the cannon fodder. Belaphon popped them with a light spell and Vandohl gave out a war whoop that sent them running before the dogs could get in on the act. Those damned dogs... The orcs don't know how many there are because they've only seen them one at a time. They believe there is a pack of them and not just two.
During the party's second night in cave C, the orcs attempted a second attack via the secret door. The party expected this. They has made a rather nasty hedgehog trap of sharp sticks in that hallway and they wove a stick door for the entrance to the cave system. The dogs roam the area freely. The orcs got nailed with a magic missile for their trouble and retreated.
I have a score card for the orcs.
In area B, there were 22 male orcs and 8 of them died in the attack on the goblins last session. There are also 18 females and 9 children. In area C, there were 16 male orcs and 5 were killed in the fighting with the party. The remainder escaped to area B with all 8 female orcs and the 3 children. One more died in the attack on the second night.
The orcs collectively have suffered 35% causalities, or more. If something doesn't change, the party will annihilate them.
That change? Some of those non-combatant females now have swords. They are going down with out a fight.
I'll be doling out experience for the party as soon as they catalog their new findings. I expect several to level up.