Simplify the following text for a Grade 7 native English-speaking person.
Original: The Battle of Polygon Wood was a small conflict that took place during the second phase of the Battle of Passchendaele in World War I. The majority of the battle was fought near Ypres , Belgium , in an area named the Polygon Wood after the layout of the area .
Simplified: The Battle of Polygon Wood was a small battle that took place during the second phase of the Battle of Passchendaele , in World War I.