If anybody care about the Ace locations, here is list from gamefaqs. For me, the guide isn't necessary if you learn all of Welkin's orders from Graveyard and unlock his last order that reveals all hidden units from the fog of war. It's a good reference if you forgot what stage these Aces are placed or weapons they drop.
Aces
[quote name='neoshadow919']
Chapter 2: Segular the Wall (ZM Kar 1), north-east of your tank in turn 3
Chapter 3: Ty the Immortal (ZM MP 1), second grass field north of your tank
Chapter 5: Lt Nonnenkof (ZM MP 2), south-west corner of the enemy base
Chapter 6: Malya the Dust (ZM SG 1), north-east of the map behind an L wall
Chapter 7: Kanazar the Lion (ZM Kar 2), coming with Selvaria
Chapter 8a: Ty the Immortal (ZM MP 3), north-west of the map (can't miss him)
Chapter 8b: Zytreet the Lynx ((ZM SG 2), centre of the map (you should see him at the beginning)
Chapter 10a: Oswald the Iron (ZM Kar 3), north-west of the map, you have to take the second train to go up there or shoot him from the bridge with a sniper/tank
Chapter 10b: Tavyse the Beast (ZM SG 3), south-east of the map, you have to take the train to reach him
Chapter 11: Cpt. Nonnenkof (VB FW 1), just north-west of the enemy main camp (can't miss him)
Chapter 12: Mash the Hunter (ZM SG 4) and Yosnoa the Hound (Enhanced Block Pin for Edelweiss), you should see them at the beginning, Mash is the tank and Yosnoa is in their main camp
Chapter 13: Sima the Younger (ZM Kar 4), west of the map behind the bunker
Chapter 14: Sima the Elder (ZM MP 4), you see him at the beginning shooting at someone
Chapter 15a: Ozwald the Steel (ZM Kar 5) and Matz the Cleaner (Firing Calculator for Edelweiss), Ozwald is hiding in grass north-east of the map and Matz is a big tank just south-west of Ozwald
Chapter 16: Shuntr the Mount (ZM SG 5), a sniper at the end of the map (can't miss him)
Chapter 17: Ty the Immortal (ZM MP 5), in the south-western enemy bas, will run to the south in a small alley with sandbags (you can wait him here if you like surprise party)[/quote]
Decorations
[quote name='neoshadow919']
Gallian Medal of Honor - Complete the Chapter 9 battle "Kidnapping of Cordelia"
Fouzen Service Medal - Complete the Chapter 10 battle "Liberation of Fouzen"
Naggiar Service Medal - Complete the Chapter 14 battle "Showdown at Naggiar(2)"
Ghirlandaio Service Medal - Complete the second Chapter 15 battle "To Fell a Citadel"
Savior of Gallia - Beat the game and begin a new game from the saved file
The Lance of Gallia - Kill an enemy ace
The Bronze Arms of Gallia - Kill 250 enemy units
The Silver Arms of Gallia - Kill 500 enemy units
The Golden Arms of Gallia - Kill 1000 enemy units
The Splintered Horn - Let a character who has unlocked his/her hidden potential die in combat
The Crimson Heart - Have a soldier who has fallen in combat survive eiter by calling a medic or clearing the battle before they die
Order of the Golden Wings - Train all character classes to level 20
The Wings of Solidarity - Unlock the full personnel profiles for all recruits
Excellence in Leadership - Learn every order
Excellence in Armament - Commission all weapon upgrades and collect all enemy ace and royal weapons
Excellence in Technology - Commission all tank upgrades (including all three level 3 Edelweiss upgrades) and collect all enemy ace tank parts
Gallian Front Commemorative - Complete all chapters and reports
Order of the Holy Shield - Complete any chapter battle after Chapter 10 without any of your units being reduced to 0 HP
Order of the Holy Lance - Earn an A Rank on any chapter battle after Chapter 10
Randgriz Crest of Honor - Earn and A Rank on every battle, including all reports and all ranks of all skirmish battles[/quote]
http://www.gamefaqs.com/boards/genmessage.php?board=942165&topic=46657840