Manlio Vivarelli was from Pistoia.

Sergente Vivarelli took part in the Spanish Civil War where he served in the Caza del Tercio.

During alférez Rafael Peña Dugo’s (Grupo de Caza N^o 11) second sortie on 27 September 1936, six Republican fighters escorting a Potez 540 were attacked by five CR.32s led by capitán Ángel Salas Larrazábal, who chased the bomber. Sergente Vivarelli shot down the D.372 flown by alférez Peña, who bailed out with a leg wound. It is possible that British pilots Vincent Doherty and Eric Griffiths were also wounded during the same combat, although both managed to fly their D.372s back to Getafe airfield.
Peña was initially treated at the hospital in Toledo, before being evacuated to Madrid just prior to the provincial capital falling into enemy hands. His wound eventually became gangrenous and his leg had to be amputated.

Vivarelli claimed 1 biplane victory during the Spanish Civil War.

Claims:

Kill no.	Date	Time	Number	Type	Result	Plane type	Serial no.	Locality	Unit
	1936
1	27/09/36		1	D.372 (a)	Destroyed	Fiat CR.32		Toledo area	Caza del Tercio

Biplane victories: 1 destroyed.
TOTAL: 1 destroyed.
(a) Alférez Rafael Peña Dugo’s of Grupo de Caza N^o 11 shot down.

Sources:
Elenco Nominativo dei Militari dell' A. M. Decorati al V. M. Durante it Periodo 1929 - 1945 2 Volume M - Z
Spanish Republican Aces – Rafael A. Permuy López, 2012 Osprey Publishing, Oxford, ISBN 978-1-84908-668-4
Additional information kindly provided by Alfredo Logoluso.