April 10, 1866
Treaty of Prussia with other states in 1866
Battle of Austro-Prussian War, 1866
Naval operations on Lake Garda
1866 battle of the Paraguayan War
1866 treaty between Chile and Bolivia
1866 battle in Mexico
Capture of the Paquete de Maule
Naval confrontation in the Paraguayan War
1866 battle during the Paraguayan War
1866 naval battle between Spain and Peru