Arms  A Armory From  Noun B Place Military

ar·mory
 \\ˈärm-rē, ˈär-mə-\\ noun 
(plural ar·mor·ies)1.
  a. a supply of arms for defense or attack
  b. a collection of available resources
2. a place where arms and military equipment are stored; especially : one used for training reserve military personnel
3. a place where arms are manufactured

ar·mo·ry
I. \ˈärm(ə)rē, ˈȧm-, -ri\ noun
(-es)
Etymology: Middle English armourie, alteration (influenced by Middle English armour armor) of armurie, from armure armor + -ie -y — more at 
1. 
 a. archaic :  : defensive and offensive arms
 b. archaic : protective trappings : defensive gear
 c. : ensemble of arms for defense or attack : array of weapons
  < an important weapon in the antiaircraft armory >
 d. : the storehouse of resources : repository of usable material : collection of available data
  < within the armory of the artist >
  < a whole armory of intellectual tools — Sidney Hook >
  < his armory of mythological lore — Dudley Fitts >
2. : a place where arms and military equipment are deposited, often being a large building including also a drill hall and offices
3. : a usually government-owned building or site where arms (as rifles, pistols, bayonets, and swords) are manufactured
II. noun
(-es)
Etymology: Middle French armoierie, from Old French, from armoier to blazon (from armes arms, coat of arms) + -erie -ery — more at 
1. : the art of blazoning arms : 
2. :  IV 2a
3. 
 a. : a branch of heraldry that treats of coat armor
 b. : the use and display of coat armor
 c. : a book of coats of arms arranged in the order of the bearers' names — compare