square / frame / rule / (legal) case / style / character / standard / pattern / (grammar) case / (classical) to obstruct / to hinder / (classical) to arrive / to come / (classical) to investigate / to study exhaustively
Battle of Stalingrad (1942-1943), decisive battle of Second World War and one of the bloodiest battles in history, when the Germans failed to take Stalingrad, were then trapped and destroyed by Soviet forces