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Which farms were important defensive positions at the Battle of Waterloo?

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Historical battle map showing troop positions at the Battle of Waterloo on June 18, 1815, near Brussels, Belgium. Red lines represent Anglo-Dutch infantry and cavalry under Wellington, positioned north of French forces. Blue lines show French infantry and cavalry under Napoleon, with both armies facing each other across a central road. Key locations like Chateau de Goumont (Hougoumont) and Plancenoit are labeled, and an inset map highlights the location within present-day Belgium and Europe. — Battle of Waterloo Battle of Waterloo, June 18, 1815.

At the Battle of Waterloo, several farms served as critical defensive positions that bolstered the strength of the Duke of Wellington’s line against the French army.12

The most significant of these were:

Hougoumont: This château and its surrounding grounds served as a vital advance post located about 500 yards in front of the main British line. It was subjected to intense, day-long French assaults but remained held by Allied troops throughout the battle.12
La Haye Sainte: Situated roughly 1,100 yards east of Hougoumont, this farm and its adjacent sandpit acted as a key Allied fortress. Its position was essential to maintaining the integrity of the Allied center.12

Additionally, the farms of La Haye and Papelotte, located farther to the east, served as less prominent but still relevant outposts during the engagement. These positions allowed Wellington to make expert use of the terrain, providing cover and defensive depth that proved decisive in the conflict.2