Fort Revere
Endicott period

Name
No. of guns
Gun type
Carriage type
Years active
Ripley
2
12-inch gun M1888
barbette M1892
1901-1943
Sanders
3
6-inch gun M1903
disappearing M1903
1903-1943
Pope
3
6-inch gun M1903
disappearing M1903
1903-1917
Field
2
5-inch gun M1897
balanced pillar M1896
1901-1917
Antiaircraft Battery 1
3
Unknown, possibly 3-inch gun M1917
Unknown, possibly AA pedestal
1936-1945
AMTB 941
4
90 mm gun
2 fixed M3, 2 towed
1943-1946

Question: What was Fort Revere's latest addition to their artillery?
Answer: A battery of four 90 mm guns known as AMTB 941 was built in Fort Revere in 1943.