The US Army Corps of Engineers built the first Army railroad on Oahu in 1907 to use for construction of Fort Kamehameha.
Government tracks w.
The Oahu Railway & Land Company (OR&L) provided most Rail service to the Army, beginning with Fort Shafter in 1905 and Schofield Barracks in 1909.
Seven batteries were built between 1907 and 1920, and the "temporary" railroad not only remained but was expanded to become a permanent one in 1920 with the establishment of the 41st Coast Artillery (Railway).
The US Army Corps of Engineers built the first Army railroad on Oahu in 1907 to use for construction of Fort Kamehameha