It is because at arsenal the army arsenal was there.
Taiyuan Arsenal was created in 1912.
Berekum Arsenal was created in 1978.
Your Arsenal was created on 1992-07-27.
Hanyang Arsenal was created in 1891.
Charleston Arsenal was created in 1841.
Arsenal AD was created in 1878.
Arsenal L.F.C. was created in 1987.
Cuiabá Arsenal was created in 2006.
Benicia Arsenal was created in 1855.
Watervliet Arsenal was created in 1813.
Rome Arsenal was created in 1813.
Allegheny Arsenal was created in 1814.