Attack On Titan: Before The Fall 16

At last, the fateful day of the expedition arrives. If the Survey Corps doesn't use its newfangled maneuvering equipment to bring back evidence of a dead Titan, then humanity's best (and only) option for fighting back will be dismantled forever! The team of untested young recruits only has one shot, and they have to make it count–but the conditions are poor, and there are dark clouds on the horizon…

Volume 16 of the Attack on Titan: Before the Fall manga series by Ryo Suzukaze.