Chapter 19: Dragon's Gate

Objective	Boss	Units allowed	Units gained
Seize the Throne	Darin, Cameron	14	Legault
Items droped by emeny	Items that you can steal from enemy		Chest/Village
Silver Bow/Door Key, Chest Key, Door Key X2, Short Spear, Halberd, Armorslayer	Door Key, Antitoxin, Chest Key, Member Card		Luna, Blue Gem, Barrier, Guiding Ring, Brave Bow
Initial Enemy		Reinforcements
6 Knight, 6 Cavalier, 4 Nomad, 2 Shaman, 1 Mage, 1 Archer, 1 Sniper, 1 Soldier, 1 Myrmidon, 1 Troubadour		7 Mage, 6 Knight, 4 Pegasus Knight, 3 Archer, 2 Fighter, 2 Mercenary, 1 Shaman, 1 Thief, 1 Legault

Shops:

Secret		Secret
Killing Edge	1300 G	Iron Blade	980 G
Killer Lance	1200 G	Steel Blade	1250 G
Killer Axe	1000 G	Silver Blade	1800 G
Killer Bow	1400 G	Physic	3750 G
Elixir	3000 G	Unlock	1500 G
Chest Key	1500 G
Lockpick	1200 G

This is the only chapter where you can get a member card to gain access to secret shops.
This chapter is not hard if you plan everything out first.
First, if you want a door key, kill the sniper to your left, if you want a silver bow, wait until he opens the door with the door key, then the silver bow can be obtained if you defeat him.
Break your group into 2 small groups, each with Lyn or Eliwood, also remember to leave a few units behind to protect Merlinus. Follow the black lines on the map that I made, move quickly to the right side of the map where the cheasts are. Once you made your way there, block the bottom staircase of the eastern room with 2 units so that the thief can't escape. By now Legault should moved to the middle of the room trying to take from the cheasts, or already took whatever's in the cheasts, use Lyn or Eliwood to talk to him so he could join you, then move Legault down and steal the member card from the thief. Now you'll be able to buy all the killer weapons that you need.
Note:If you kill the boss before turn 6, the thief that carries the member card won't show up.

Boss Strategy:
Darin: Not hard, use 2-3 of your high defence units to attack him on the same turn, heal when needed. Lyn with Mani Katti is very good against him.
Cameron: Not hard at all, just attack.

Reinforcement:
Legault(upper left corner)after enemy's 1st turn

1 Archer(staircase in the bottom left room),
1 Mage(staircare in the small room to the left),
1 Archer, 1 Fighter(staircare in the bottom right room),
1 Mercenary(staircase in the middle room) after enemy's 4th turn

1 Archer, 1 Fighter(staircare in the bottom right room),
1 Shaman(staircase in the millde room) after enemy's 5th turn

1 Thief(bottom staircase in the eastern room),
1 Mercenary(Staircase in the middle room) after enemy's 6th turn

2 Pegasus Knight(bottom left corner) after enemy's 8th turn
2 Pegasus Knight(bottom left corner) after enemy's 9th turn

2 Mage(upper left corner) after enemy's 19th turn
2 Knight(upper left passage) after enemy's 20th turn
2 Mage(upper left corner) after enemy's 21th turn
2 Knight(upper left passage) after enemy's 22th turn
2 Mage(upper left corner) after enemy's 23th turn
2 Knight(upper left passage) after enemy's 24th turn