The Lioré-et-Olivier LeO 5 was a French ground attack biplane, built shortly after World War I, initially to the S2 armoured attack aircraft specification and then to the Ab2 specification, from the STAé (Service Technique de l'Aéronautique).
Further reading
Hartmann, Gérard. Les Avions Lioré Et Olivier. Boulogne-Billancourt, France: ETAI. 2002. (in French)
