Jacananana - FMAMC
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This mod adds a military coat from Fullmetal Alchemist to Fallout 3. It has 3 gold stars on it's sleeve, which, in Fullmetal Alchemist represents the rank of colonel. It is just a piece of clothing and it only has the usual qualities of armour, nothing special. 
It can be found in a footlocker near the entrance to Big Town (see screenshots).

Console Command to get "FMA Military Coat": player.additem XX000EA7 Y
Where:
XX is the esp's load order; and
Y is the quantity of the item.
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Jacananana - FMAEC
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This mod adds Edward's coat from Fullmetal Alchemist to Fallout 3. It is just a piece of clothing and it only has the usual qualities of armour, nothing special. 
It can be found in a footlocker near the entrance to Big Town (see screenshots).

Console Command to get "Edward's Coat": player.additem XX000EA7 Y
Where:
XX is the esp's load order; and
Y is the quantity of the item.
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Location
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All of the items are located in footlockers inside big town, near the entrance.