Ennio Grifoni was born in Firenze on 14 January 1917.

On 20 December 1940, Tenente Arnoldo Laurenzi, Tenente Camillo Luglio, Sottotenente Orlando Mandolini (from the 93^a Squadriglia, 8^o Gruppo) and Sottotenente Ennio Grifoni were assigned to the 91^a Squadriglia, 10^o Gruppo.
This unit was at the time equipped with Fiat CR.42s and operated in North Africa

The last Italian bombing mission on 27 December was again against Sollum. Four S.79s from the 41^o Stormo under Tenente Colonnello D’Ippolito and four bombers from the 216^a Squadriglia, 34^o Stormo, led by Tenente Romanini took off from Tmini at 14:30. It seems that the escort of 19 CR.42s from the 10^o Gruppo stayed with the 41^o Stormo, which attacked British mechanized units in Halfaya and Gabr Bu Fares under heavy AA that damaged, although slightly, all the aircraft. The unescorted S.79s of the 34^o Stormo attacked ships in Sollum harbour and were intercepted by many Hurricanes. The S.79s were totally unable to defend themselves because of icing on all the guns and one of them was shot down. This was Sottotenente Aldo Peterlini’s bombers and Peterlini was killed together with his three of his crew (Sergente Maggiore Arturo Scagnetti (second pilot), Aviere Scelto Motorista Alcide Frizzera and Aviere Scelto Radiotelegrafista Gioacchino Scuderi). The other two members of the crew (Primo Aviere Armiere Ciancilla and Primo Aviere Montatore Fiore) where able to bale out. Tenente Pandolfi’s aircraft was riddled by enemy bullets (probably RD) while the other two S.79s were less seriously damaged although suffering some wounded among their crews.
They had been intercepted by 33 Squadron, which claimed three S.79s and one probable and probably two CR.42s during offensive patrols performed by pairs of Hurricanes over Sollum. They also claimed one S.79 and one CR.42 damaged. Vernon Woodward claimed one of the probable CR.42s and the damaged CR.42.
The CR.42 escort was composed of seven fighters from the 90^a Squadriglia (Tenente Giovanni Guiducci, Tenente Franco Lucchini, Sottotenente Alessandro Rusconi, Sottotenente Neri De Benedetti, Sergente Alfredo Sclavo, Sergente Bruno Bortoletti and Sergente Enrico Botti), six from the 84^a Squadriglia (Capitano Luigi Monti, Tenente Antonio Angeloni, Sottotenente Bruno Devoto, Sergente Maggiore Salvatore Mechelli, Sergente Domenico Santonocito and Sergente Piero Buttazzi) and six from the 91^a Squadriglia (Maggiore Carlo Romagnoli, Capitano Vincenzo Vanni, Sottotenente Andrea Dalla Pasqua, Sottotenente Orlando Mandolini, Sottotenente Grifoni and Sergente Elio Miotto). Tenente Guiducci strangely reported that the heavy AA immediately hit one of the S.79s, which was shot down. Then five monoplanes (Hurricanes and Spitfires(!)) tried to attack but were immediately counterattacked and one of them was shot down. Later, another attempt by a lone British fighter failed after the intervention of the Italian escort. The 90^a Squadriglia pilots expanded 320 rounds of ammunition and it seems that in the end the victory was assigned to the whole formation as a Gruppo victory.

Grifoni was killed on 4 January 1941.

At the time of his death, Grifoni was credited with 1 shared biplane victory.

Claims:

Kill no.	Date	Time	Number	Type	Result	Plane type	Serial no.	Locality	Unit
	1940
	27/12/40	14:30-	1/19	Hurricane (a)	Shared destroyed	Fiat CR.42		Sollum area	91a Squadriglia

Biplane victories: 1 shared destroyed.
TOTAL: 1 shared destroyed.
(a) Claimed in combat with Hurricanes from 33 Squadron, which didn’t suffer any losses. 33 Squadron claimed two CR.42s and one probable but the 10^o Gruppo didn’t lose any aircraft.

Sources:
2^o Stormo - Note storiche dal 1925 al 1975 - Gino Strada, 1975 USSMA, Rome, kindly provided by Ludovico Slongo
Ministero della Difesa - Banca Dati sulle sepolture dei Caduti in Guerra
Quelli del Cavallino Rampante - Antonio Duma, 1981 Editore Dell'Ateneo, Roma kindly provided by Ludovico Slongo
Additional information kindly provided by Ludovico Slongo