Which road did Papelotte command for arriving Prussian reinforcements?

Papelotte commanded the road to Wavre, the route by which Prussian reinforcements could approach Wellington’s position.

Papelotte was a fortified farmstead on the Anglo-Allied army’s left flank at Waterloo. Along with Hougoumont and La Haye Sainte, it formed one of the advanced positions protecting Wellington’s main ridge. Its location was strategically important because it covered approaches from the east, including the road leading toward Wavre.

That connection mattered because the Prussian army had regrouped around Wavre after its defeat at Ligny on 16 June 1815. Wellington expected Gebhard von Blücher’s forces to march toward Waterloo, and Papelotte helped secure the flank through which those reinforcements would arrive. The Prussians began reaching the battlefield during the afternoon and evening, increasing pressure on Napoleon’s right.

Papelotte was briefly occupied by French troops late in the battle after its garrison withdrew when ammunition ran low. The French could not exploit the success, however, and the position soon helped shield the advancing Prussian forces.