714 Patients with locally advanced resectable (T2-4 and/or N+, M0) adenocarcinoma of the stomach or the esophagogastreal junction without previous therapy will be included in this study. After randomization patients receive perioperatively 4 cycles FLOT or 3 cycles ECF, followed by a restaging of the tumour status and surgery. Subsequently another 4 cycles of FLOT or 3 cycles ECF are applicated. Then a central validation of the pathological remission rate is scheduled. Primary endpoint is overall survival, secondary endpoints are disease free survival, perioperative morbidity and mortality, histopathologic regression rate and R0-resection rate.