Brother against Brother

Brother against Brother is the first scenario in the El Cid campaign in Age of Empires II: The Conquerors.

The mission starts of with the player having possession of only El Cid himself, El Cid proceeds to a tournament, and by defeating an opposing Two-Handed Swordsman and Knight, he becomes the champion of King Sancho of castille. King Sancho then gives El Cid a decent army of Conquistadors, Knights and Long Swordsmen, as well as four Villagers.

King Sancho then gives El Cid his objective; to capture King Alfonso, so they can speak- and maybe peace between their reigns can be restored. This is done by destroying the Castle in the center of the fort in the west, owned by the team King Alfonso's Army (blue/Spanish). You can take control from the Serf's village near the river.

Allies

 * King Sancho (Spanish). They are the largest team on the map, occupying the entire eastern and southern regions of the map. They are your strongest ally, and have six Castle, meaning almost any attack aimed at them would be in vain, however, they do not have much in the way of an army. If at the tournament in the beginning, you attend to walk away, El Cid is claimed to be not the Cid, and the king changes his diplomacy to enemy and attacks you.
 * Serfs (Spanish). They occupy a small region between the two forts of King Sancho and King Alfonso. They have a few villagers who work on farms, and are on the Dark Age. They get disgruntled should any of El Cid's army trample their crops, changing their stance to you as 'enemy' if you ignore their repeated warnings. They will pledge themselves to the Cid if they see him in person (they would apologize to the Cid if the previously mentioned incident has happened), giving you four-five additional villagers and their houses.
 * King Alfonso (Spanish). The weakest team on the map, having only one unit: King Alfonso himself. Their stance to you is 'enemy'. By destroying the castle belonging to King Alfonso's Army, you gain control of King Alfonso, and must take him to King Sancho's castle next to the tournament arena where this mission first started.

Enemy

 * King Sancho's Champion (Spanish). One of the weakest teams on the map, they are present only at the beginning of the mission, when El Cid must kill the one Knight and Two-Handed swordsman that this team possess. They also surrender four villages to you at the beginning.

Enemy to Ally

 * King Alfonso's Army (Spanish). This team is the most powerful team on the map, and your only real enemy. You must destroy their Castle they have in the center of the map before bringing King Alfonso to the tournament ground. Once their castle is destroyed, they will immediately chance their stance to you as 'neutral' (be careful not to let their soldiers or towers attack King Alfonso, whom you just gained control) and then switch to 'ally'. They train an army of Scorpions, Monks, Spearmen (later Pikemen) and a couple of War Galleys patrol the rivers nearby.

Note: This is the Only Scenario of the El Cid Campaign to not have any Moors.