Once more unto the breach, dear friends, once more

Henry V is a history play by William Shakespeare, believed to have been written near 1599. It tells the story of King Henry V of England, focusing on events immediately before and after the Battle of Agincourt (1415) during the Hundred Years' War. In the First Quarto text, it was titled The Cronicle History of Henry the fift, and The Life of Henry the Fifth in the First Folio text.

The play is the final part of a tetralogy, preceded by Richard II, Henry IV, Part 1, and Henry IV, Part 2. The original audiences would thus have already been familiar with the title character, who was depicted in the Henry IV plays as a wild, undisciplined young man. In Henry V, the young prince has matured. He embarks on an expedition to France and, his army greatly outnumbered, defeats the French at Agincourt.