Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Battle of Beecher Island:

"

Forsyth hand-picked 48 men at Forts Harker and Hays and armed them with Spencer repeating rifles. Forsyth's executive officer was Lieutenant Fredrick H. Beecher of the 3rd Infantry, a decorated veteran of the Battle of Gettysburg. His company rode northwest nearly to Nebraska, then turned southwest and reached Fort Wallace the night of 5 September without finding any trace of Indians.