Collapse of the Alliance

Collapse Of The Alliance is Chapter 4 of Fire Emblem: Fuin no Tsurugi.

Chapter 4 begins with Roy making his way towards Ostia, the head territory of the Lycian League. However on his journey through Lycia to Ostia Roy passes through the Lycian territory of Laus.

After the chapter's introduction, a conversation is shown between one of Bern's Wyvern Lords, Nacien and the current Marquess of Laus, Erik. The conversation implies Laus's betrayal of Lycia to Bern, and also involves Clarine who Erik had brought to Laus on the request of Nacien.

During the conversation Nacien and Erik are made aware of Roy's forces who will be momentarily passing by Castle Laus on route to Ostia. Nacien then soon after takes his leave, and Erik prepares the Laus army to ambush Roy's forces to prove himself a worthy ally to Bern. The battle then after ensues.

Terrain
The battle takes place in the area around and to the east of Castle Laus. The player's units are deployed in the north-eastern side of the map.

The south-east portion of the map is dominated by a large body of water that streches off-screen through the south and east. This body of water includes three miniature islands which are impossible to reach (due to the water) by any of the player's units except Thany, who can fly there. Two of these islands include forts, which Pirates will come of in the later turns of the battle.

The north-west side of the map is covered by a small mountain range which will play very little into the battle. this range extends from above Castle Laus to near the middle of the map at the top.

Three villages also exist on this map. The first one is to the North-East, and can be reached in the first turn, it gives a Door Key. The second is to the North in the middle of the map, there the player will recive a Steel Blade. Finally, to the South near the middle of the map is a final village which is far from the main area which the battle takes place in. This village is the most important, giving the player an Angelic Robe. The Pirates will try to reach this Southern village, although they can easily be routed or beaten to the punch.

A few forested spaces are scattered around the edges of the map, although they will not often come into consideration due to their placement. However, if the battle takes an odd turn they can offer good defensive cover.

Also a cliff lays underneath the Northern most village, making access to it limited to only a space or two. This could be used tactically to invade from the north but is not necessary.