The Grand Battery starts its bombardment thumb|upright=1.35|Map of the battle: Napoleon's units are in blue, Wellington's in red, Blücher's in grey thumb|upright=1.35|Detailed map of the crisis of the battle (Atlas to Alison's history of Europe) The 80 guns of Napoleon's grande batterie drew up in the centre. These opened fire at 11:50, according to Lord Hill (commander of the Anglo-allied II Corps), while other sources put the time between noon and 13:30. The grande batterie was too far back to aim accurately, and the only other troops they could see were skirmishers of the regiments of Kempt and Pack, and Perponcher's 2nd Dutch division (the others were employing Wellington's characteristic "reverse slope defence").
The Grand Battery starts its bombardment thumb|upright=135|Map of the .battle: Napoleon's units are in blue, Wellington's in red, Blücher's in grey thumb|upright=1.35|Detailed map of the crisis of the battle (Atlas to Alison's history of Europe) The 80 guns of Napoleon's grande batterie drew up in the centre. These opened fire at 11:50, according to Lord Hill (commander of the Anglo-allied II Corps), while other sources put the time between noon and 13:30. The grande batterie was too far back to aim accurately, and the only other troops they could see were skirmishers of the regiments of Kempt and Pack, and Perponcher's 2nd Dutch division (the others were employing Wellington's characteristic "reverse slope defence").