Skirmish in Balin's Tomb

The Battle of the Chamber of Mazarbul, also known as the Skirmish in Balin's tomb, is a battle between the Orcs of Moria and the Fellowship of the Ring.
=== Prelude ===
The Fellowship of the Ring arrived at the gates of Moria finding a riddle on the gate saying "Speak friend and enter". While Gandalf attempted to solve the riddle, Boromir threw a rock as he awaited for the door to open. Unbeknownst to him, the rock disturbed the Watcher in the Water who, right after Gandalf managed to open the gates rose from the lake and tried to take Frodo, though he was shot by Legolas and the entire Fellowship managed to escape to inside the mountain. In rage, the creature destroyed the gate-area, barricading their way out. The Fellowship then had no choice but to move forward deep into Moria to exit via the eastern gate, a three days march away. While en route to the exit they camp for a time in a guardroom near a crossroads of three passages that has a deep well in it. Pippin foolishly threw a stone down the well out of pure curiosity, angering Gandalf and alerting the Goblins to their presence. After some deliberation, Gandalf chose the passage to the right. Slowly, they made their way through the mines until they come to the twenty-first hall, and through that, the Chamber of Records that held Balin's Tomb. As Gandalf read the records, the colony of Moria drums begun to sound and the Goblins move towards the Fellowship.
=== Battle ===
The Fellowship had barred the doors, however, the goblins and a Troll were still able to break through and rush inside to attack. Eventually, the troll is wounded and retreats, along with many Goblins, and the Fellowship attempts to escape through the Eastern exit, but the goblin chieftain breaks in stabbing Frodo in the chest with a long spear. Aragorn deals with the chieftain and then picks up Frodo and flees with the rest of the Fellowship. They are amazed when Frodo tells them that he is unharmed, and reveals his mithril vest to the fellowship. Soon after, the Fellowship leaves Balin's tomb and heads towards the Bridge of Khazad-dûm. The goblins managed to surround the Fellowship but when they were about to attack, the sounds of a great noise made them flee the scene. Gandalf realized that the goblins fled because they were frightened of the Balrog, an ancient evil servant of Morgoth that had been roused and was now aware of them all. Gandalf tried to seal the door to the chamber against the Balrog but the latter proved too strong. After moving down the path they discovered a huge chamber with a fiery chasm. Then, the goblins and the Balrog pursued the Fellowship again, signified by the drums starting again. The Fellowship turned and fled to the Bridge of Khazad-dûm. As they reached and crossed the bridge, several goblin archers shot at them. When the Balrog reached their heels, Gandalf commanded the rest of the group to cross the bridge. He then commenced to battle the Balrog. Gandalf revealed his title to the Balrog, causing him to shrink away. Then as he returned to hit Gandalf with his molten sword, Gandalf put up a shield of his power, defying the strike. In the end, Gandalf with his staff made the bridge to collapse at the feet of the Balrog. The Balrog fell, but used its whip to take Gandalf with him, and both fall into the abyss. The rest of the Fellowship mourned and were in terror, but Boromir and Aragorn led them out of the mines and towards Lothlórien.