Wings of the Bulwark

Wings of the Bulwark (干城の翼) is the 1st chapter of the 13th volume and the 45th chapter overall of the Attack on Titan: Before the Fall manga, written by Ryō Suzukaze and illustrated by Satoshi Shiki.

Overview
After seeing the new version of the Device, Kuklo goes to test it in the forest. After learning how the device operates, he performs a test run and marvels how it is much easier to operate. Impressed as well, Jorge inquires if it is possible to mass-produce it for all members of the Survey Corps; however, Sharle notifies them that she went to Gloria Bernhart of the Military Police and requested that the Device be allowed to be properly tested. Gloria agrees but demands proof that it can defeat a Titan; otherwise, the Survey Corps will be permanently disbanded!