Lololol the proofreader's note on chapter 10 is so wrong it hurts. They say CBR stands for "community-based rehabilitation" which is true but unrelated to the context and probably caused by a bad Google result. CBR in the context "CBR training as a soldier" refers to Chemical, Biological, and Radiological training. This is the training where soldiers are exposed to agents like tear gas, which is why his eyes burning from the poison remind him of it.