In any film beginning in wartime In Medias Res, it is almost taken for granted that a narration intoning opening text will describe the start of the war and provide a little history lesson... even if it's a fictional war. * Opening narration / text crawl, often over a map, with drums or other fanfare. (This trope is big on drums.) * Story begins In Medias Res... * Usually, with an Action Prologue. This opening narration requirement can be removed if, as often the case, the writer decides on one of the alternatives, such as: Not to be confused with During the War.