Editing Battle of Waterloo (section)

===Arrival of the Prussian IV Corps: Plancenoit===
{{see also|Waterloo campaign: Ligny through Wavre to Waterloo#Prussians advance to the Wood of Paris|l1=Prussians attack out of the Wood of Paris}}
{{blockquote|Night or the Prussians must come.|Wellington.{{sfn|Barbero|2006|p=242}}}}
[[File:Prussian Attack Plancenoit by Adolf Northern.jpg|thumb|upright=1.2|The Prussian attack on [[Plancenoit]] painted by [[Adolph Northen]]]]
The [[Order of battle of the Waterloo campaign#Prussian IV Corps|Prussian IV Corps]] (Bülow's) was the first to arrive in strength. Bülow's objective was Plancenoit, which the Prussians intended to use as a springboard into the rear of the French positions. Blücher intended to secure his right upon the [[Châteaux Frichermont]] using the Bois de Paris road.{{sfn|Hofschröer|1999|p=116}} Blücher and Wellington had been exchanging communications since 10:00 and had agreed to this advance on Frichermont if Wellington's centre was under attack.{{sfn|Hofschröer|1999|p=95}}{{efn|Chesney states that Wellington and the Prussians remained in contact and that it was agreed that Bülow followed by Pirch would take the poorer road to "Froidmont" (Frichermont), while Zieten would take the longer northern, but better made, road via Ohain {{Harv|Chesney|1874|pp=173–178}}.}} General Bülow noted that the way to Plancenoit lay open and that the time was 16:30.{{sfn|Hofschröer|1999|p=116}}

At about this time, the [[Order of battle of the Waterloo campaign#Prussian 15th Brigade|Prussian 15th Brigade]] ({{interlanguage link|Michael Heinrich von Losthin|de|lt=Losthin's|vertical-align=sup}}) was sent to link up with the Nassauers of Wellington's left flank in the Frichermont-[[La Haye, Lasne|La Haie]] area, with the brigade's horse artillery battery and additional brigade artillery deployed to its left in support.{{sfn|Hofschröer|1999|p=117}} Napoleon sent Lobau's corps to stop the rest of Bülow's IV Corps proceeding to Plancenoit. The 15th Brigade threw Lobau's troops out of Frichermont with a determined bayonet charge, then proceeded up the Frichermont heights, battering French Chasseurs with 12-pounder artillery fire, and pushed on to Plancenoit. This sent Lobau's corps into retreat to the Plancenoit area, driving Lobau past the rear of the ''Armee Du Nord''{{'}}s right flank and directly threatening its only line of retreat. Hiller's 16th Brigade also pushed forward with six battalions against Plancenoit.<ref name="Hussey2017">{{cite book |last=John Hussey |url=https://books.google.com/books?id=_VDVDwAAQBAJ&pg=PT178 |title=Waterloo: The Campaign of 1815, Volume II: From Waterloo to the Restoration of Peace in Europe |year=2017 |publisher=Pen and Sword |isbn=978-1-78438-202-5 |pages=178–}}</ref><ref name="Siborne1848">{{cite book |last=Siborne |first=William |title=The Waterloo Campaign, 1815 |url=https://books.google.com/books?id=RxQazrQnHSkC |publisher=E. Arber |year=1848 |page=495}}</ref>

Napoleon had dispatched all eight battalions of the Young Guard to reinforce Lobau, who was now seriously pressed. The Young Guard counter-attacked and, after very hard fighting, secured Plancenoit, but were themselves counter-attacked and driven out.{{sfn|Hofschröer|1999|p=122}} Napoleon sent two battalions of the Middle/Old Guard into Plancenoit and after ferocious bayonet fighting—they did not deign to fire their muskets—this force recaptured the village.{{sfn|Hofschröer|1999|p=122}}