This document describes the Billroth I gastric resection procedure, which involves removing part of the stomach and reattaching it to the duodenum. Key steps include transecting the stomach, attaching it to the duodenum using a circular stapler, and closing the gastrotomy site. The procedure aims to control peptic ulcers by combining hemigastrectomy with vagotomy while restoring normal gastrointestinal continuity. Postoperative care focuses on gradual advancement of oral intake and monitoring for complications.