1946 Atmoran coup d'etat

Operation Maanlichtoefening
Part of Third Voshan War and the Atmoran Civil War
Pruzhaanse Landstorm entering Alexandria,
Date 25 June – 26 June 1946 Location Alexandria, Province of Aldenberg, Kingdom of Lieseltania Result Royalist Victory Death of Louwrens van Geuzendam and arrest of other high-ranking Atmoran officials Appointment of Liberal government End of the Third Voshan War on 29 June and surrender of all Atmoran Forces Allied Occupation of Atmora
Belligerents
VSK Mizuho Supported by: Aravea Vozh	Atmoran Rijk
Commanders and leaders
Katherine I Klaas van Corbach-Boesschen Jan-Pieter van Hossen Hubrecht Muisebelt Sietse E. Bastein Wolfgang Nevelsel Gijsbert Brusse	Louwrens van Geuzendam† Theobald Clement van Aspremont Sijbrand van Manstein Floris-Jan Urbach Valentijn Tiebert Mathijs Rossmark van Avezate Gijsbert Woltersen
Units involved
Royalists Forces Regiment Fuseliers Prinsesse Winter Regiment Huzaren Prinsesse van Wolf 2e Regiment Lijf-Stootmarechaussee Royal Guards Mizuhese Grenadier Guards 5e Brigade Mariniers 51e Regiment Mariniers	Miltiary District of Alexandria 4e Regiment Huzaren Brigade Marechaussee Alexandria 49e Regiment Pantsergrenadier Marechausseee
Strength
25,000–35,000	5,000–18,000
Casualties and losses
Military killed: 12,750 Civilians killed: 1,740 Military and civilian wounded: 7,976 Total: ~22,466

The 1946 Atmoran coup d'état also known as Operation Maanlichtoefening was the forcible change of the government of the Atmoran Rijk carried out on the eve of 25 June 1946.