Tragedy in the Rain

Tragedy in the Rain (雨中の惨劇) is the 4th and final chapter of the 16th volume and the 60th chapter overall of the Attack on Titan: Before the Fall manga, written by Ryō Suzukaze and illustrated by Satoshi Shiki.

Summary
Carlo, Xavi and teams 1 through 8 approach the edge of the charted territory at an oasis ten kilometers beyond the wall; Carlo orders they wait there while sending teams 3 and 4 ahead to scout the area. Xavi notices that Carlo is behaving cautiously and is informed that the oasis is both a perfect hiding spot for both humans and Titans with blind spots located everywhere. Carlo then notices that storm clouds are returning; with rainfall imminent, he decides to have the expedition aborted. Xavi reminds him that this will lead to the Survey Corps being dissolved; Carlo reaffirms his decision to not place the lives of his soldiers in danger due to the unknown.

Just then, a red flare is fired in the distance alerting them to Titans nearby. Carlo orders the soldiers to regroup and ultimately return to the first oasis. Xavi suddenly rides towards the direction of the red flare and Carlo orders him to fall back, to no avail. He then orders his soldiers to follow their orders and goes to chase down Xavi. At the same time, rain begins to fall again and Carlo begins to question whether it was smart to send teams 3 and 4 ahead (along with choosing to undergo an expedition at all with poor conditions). He then brushes aside those concerns and to focus on the task at hand.

As team 10 begins to panic over losing sight of the red flare, Kuklo asks Rosa what they should do. At this time, team 9 rides to their location and the two teams decide what to do next. Barna mentions that he knows the territory and muses that the flare came from the farthest oasis in the south. As they travel past the halfway mark, they come across the ruins of a cart; Kuklo and Cardina go to investigate and calls the others over. The cart is revealed to be from team seven and eight and that both have been wiped out by a ten-meter Titan; Kuklo believes it to possibly the one they encountered back in Shiganshina. Barna asks Rosa whether they go fight the Titans or retreat. After a long moment, Rosa takes charge and orders them to proceed ahead.