Marache
Marache, or historically Smohain, is hamlet of Wallonia in the municipalities of Lasne, district of Plancenoit, and Waterloo, in the province of Walloon Brabant, Belgium. It is located in a defile through which runs the Smohain, a stream that rises just to the west of the hamlet. Smohain, along with the two farms of Papelotte and La Haye (which are located on the northern bank closer to the head of the same valley about  and  west of the centre of the hamlet) and the now ruined Château Fichermont (on a premonitory  south of the hamlet) formed the eastern bulwark of the Duke of Wellington's Anglo-allied line during the Battle of Waterloo on 18 June 1815. This was a strong defensive position as:

Later in the battle it was the location where the Prussian right-hand flank joined forces with the Anglo-allies left-hand flank. See also 
List of Waterloo Battlefield locations

Notes

References

Lasne
Populated places in Walloon Brabant
Waterloo Battlefield locations