Allied coalition held
Britain plus Prussia on one day.
The Concert of Europe got a battlefield stamp. British nineteenth-century self-confidence got a Sunday.
French politics got a second founding myth of defeat to argue about until 1848 and after.
Lessons
Napoleonic wars close (English dating)
1815 as a full stop.
A proverb is born
"Waterloo" as defeat.
Keep the cost as a range
about 40,000-50,000 dead and wounded in one day, usual band Battle of Waterloo is not improved by a fake precise integer.
Memory is national
US/UK/AU/CA rites and the memory of Ridge south of Brussels, present-day Belgium will not match. Name the difference when teaching Battle of Waterloo.
Unresolved
Census still a band
"about 40,000-50,000 dead and wounded in one day, usual band" remains a band. New archives refine Battle of Waterloo; they do not un-happen 18 June 1815.
Archives uneven
Files on Battle of Waterloo remain unevenly open across Ridge south of Brussels, present-day Belgium. William of Orange's paper trail is not the same as Napoleon's.
Nearest-run thing
Wellington's caption -- a proverb.
Teaching hours
English classroom hours on Battle of Waterloo still disagree with hours in Ridge south of Brussels, present-day Belgium. Is this a tactics manual? is often the gap.
Shifts
Return
Mar-Jun 1815: Elba to Belgium.
The ridge
18 June day: Hougoumont to the Guard.
Memory
After: Lion, films, re-enactors.
Afterlife of the name
Battle of Waterloo left institutions and stories that outlasted 18 June 1815. Napoleon became a caption; Ridge south of Brussels, present-day Belgium kept the rubble or the letterhead.
Outlook
Scholarship
New archives will refine Battle of Waterloo (Hougoumont, Abdication) without un-happening 18 June 1815.
Memory handover
As witnesses die, museums and film carry Battle of Waterloo. Blucher and Michel Ney will keep being recast.
This atlas
Battle of Waterloo stays a historical file -- a dated campaign, not a live order of battle or a method.
Risk
closed battle
Waterloo is historically closed. Residual risk is national myth -- a British solo -- and a tourist mound that rewrote the ground.
"Waterloo" as a verb is this battle's linguistic export.
Staff colleges taught the day until 1914 made other days.