This item is acquired in-game. See its sources below.
An Uncommon Dagger One-Hand, item level 5, binds when picked up.
First seen in build 12.0.7.68887 (Midnight (patch 12.0.7)).
In the Appearances collection, Expeditionary Dagger is listed as Quest. Appearance ID: 43760. 3 other items wear the same appearance:
Expeditionary DaggerRead from the World of Warcraft client build files.
2 quests list Expeditionary Dagger among their rewards in Blizzard's quest data.
Expeditionary Quarterstaff, 
Expeditionary Staff, 
Expeditionary Short Sword, 
Expeditionary Cudgel, Expeditionary Cudgel, 
Expeditionary Longbow, Expeditionary Longbow, 
Expeditionary Greataxe and 5 moreExpeditionary Quarterstaff, Expeditionary Staff, Expeditionary Short Sword, Expeditionary Cudgel, Expeditionary Cudgel, Expeditionary Longbow, Expeditionary Longbow, Expeditionary Greataxe and 5 moreRead from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
In their in-game specialization descriptions, these specs name daggers among their preferred weapons:
Built from the World of Warcraft client build files and recorded Auction House snapshots.
1 other item in the current build is also called Expeditionary Dagger. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Expeditionary Dagger ID 175172 · Weapon - Dagger · item level 5Expeditionary Dagger uses icon file 3736887, which 4 other items also use. The 4 closest by item ID:
NPE Weapon Dagger AGI ID 182564 · Weapon - Dagger · item level 155Flickering Eviscerator ID 182771 · ConsumableRecruit's Sturdy Shank ID 218320 · Weapon - Dagger · item level 252Recruit's Sturdy Shank ID 218332 · Weapon - Dagger · item level 252Blizzard numbers items as they are created, so the named items next to ID 175171 (175166 to 175176) were usually added in the same batch as Expeditionary Dagger: the same quest line, zone, vendor or reward set.
Expeditionary Greatsword ID 175166 · Weapon - Two-Handed Sword · item level 5Expeditionary Staff ID 175167 · Weapon - Staff · item level 5Expeditionary Quarterstaff ID 175168 · Weapon - Staff · item level 5Expeditionary Longbow ID 175169 · Weapon - Bow · item level 5Expeditionary Short Sword ID 175170 · Weapon - One-Handed Sword · item level 5Expeditionary Dagger ID 175172 · Weapon - Dagger · item level 5Expeditionary Cudgel ID 175173 · Weapon - One-Handed Mace · item level 5Expeditionary Cudgel ID 175174 · Weapon - One-Handed Mace · item level 5
Expeditionary Plate Helm ID 175175 · Armor - Plate · item level 5
Expeditionary Cloth Robe ID 175176 · Armor - Cloth · item level 5The raw ItemSparse values for item 175171 in the current client build.
Read from the World of Warcraft client build files: Item, ItemSparse, Lock, Holidays, AreaTable and CollectableSourceVendor.
First-party render from the game files. Model © Blizzard Entertainment.
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