a) Fire Emblem: In this game Marth made its appearance, to save his motherland against the forces of the evil Dolua empire.
b) Fire Emblem Gaiden: Alm and Celica travel across the continent of Valencia, to restore peace to their respective kingdoms.
c) Fire Emblem, Mystery of the Emblem: a Remake of the first one, but featuring more levels, and some minor changes.
d) Fire Emblem, Genealogy of the Holy War: perhaps the most known Fire Emblem ever to exist, where Sigurd and his friends set out to combat countless enemies in huge maps, and features a "Generation system", which allows two characters to mate and have children. With this, the children of those who mated during Sigurd period appear in the next period, where Celice (Sigurd's son) fights against the Grandbell Empire.
e) Fire Emblem, Thracia 776: This game is the most difficult of all Fire Emblem. Its main character is Leif, Celice's cousin. He attempts to start out a rebellion to recover his homeland from the tyrannical rule of King Trabant of Thracia, whom is aided by the Grandbell Empire.
f) Fire Emblem, Sword of Seals: The game features Roy as the main Lord of the game. He fights against the Kingdom of Bern, which is bent on world domination.
g) Fire Emblem, Blazing Sword: The first Fire Emblem hitting American stores. Features Hector, Lyn, and Eliwood(Roy's father) as main characters, who will try to stop the Black Fang.
h) Fire Emblem, the Sacred Stones: Features the twins Eirika and Ephraim, both princes of Renais, which fight against the nation of Grado to free their homeland.
i) Fire Emblem, Path of Radiance: Ike and his group of mercenaries must help princess Elincia of Crimea to retake her kingdom from the clutches of King Ashnard from Daein, who is bent on inmersing all of the continent of Tellius into an all out continental war.
2. In all the games, the Fire Emblem is some sort of artifact. In Fire Emblem a) and c), it is a shield which allows Marth to use the Falchion sword. In f) and g), it is a jewel which is quintessential to crown the future king of Bern. In h), it is the Sacred Stone of Grado. In i) it is also called Lehran's Medallion, and holds the spirit of a Dark God, and only a pure-hearted person can have it without growing mad.
Also, take note this series kicks all other Strategy-RPG's ass.
2. Do not use the Fire Emblem for your own uses or as a luxury jewel, or you will end up pwning your own homeland.