Detailed Instructions: In this task, you're given a statement, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.
Problem:Context: Noyes served on frontier duty at Fort Leavenworth, Kansas from November 1865 to June 1866, at Fort Riley, Kansas from June 1866 to March 13, 1867, at Fort Laramie, Dakota Territory from May 1 to November 1867, and at the newly established Fort D. A. Russell, Dakota Territory from November 17, 1867 to June 1868 Link Information: He served at Fort McPherson, Nebraska from July 1868 to May 1869 Question: Which military fortification that Noyes served at before 1870 was completed first?
Solution:
Answer: Fort Leavenworth