In June 1940 Bussoli served in the 8^o Gruppo, 2^o Stormo Autonomo C.T., which was equipped with Fiat CR.42s. The unit was at this time operating over Libya.

In the early morning on 11 June 26 Blenheims from 45, 55 and 113 Squadrons attacked the Italian landing ground at El Adem. No enemy fighters were reported met, but 55 Squadron encountered heavy anti-aircraft fire; one Blenheim crashed into the sea in flames, one crash-landed, and a third was so badly damaged that it was forced to make a crash-landing at Sidi Barrani, where it burst into flames. However, at this time seven CR.42s of 8^o Gruppo reported attacking nine Blenheims near El Adem and claimed two of these, one crew becoming POWs. One of the claims was made by Bussoli.
It is possible that the bombers crews were so intent on their first attack of the war that they didn’t see the attacking fighters.

In the early afternoon on the same day two CR.42s of 2^o Stormo reported intercepting three Blenheims, one being claimed shot down by Bussoli.

Bussoli ended the war with 2 biplane victories.

Claims:

Kill no.	Date	Number	Type	Result	Plane type	Serial no.	Locality	Unit
	1940
1	11/06/40	1	Blenheim (a)	Destroyed	Fiat CR.42		El Adem area	8o Gruppo
2	11/06/40	1	Blenheim (b)	Destroyed	Fiat CR.42		El Adem area	8o Gruppo

Biplane victories: 2 destroyed.
TOTAL: 2 destroyed.
(a) Claimed in combat with Blenheims from 45, 55 and 113 Squadrons, which lost one aircraft and two crash-landed. These losses are however according to RAF sources credited to AA.
(b) This claim has not been possible to verify with RAF sources.

Sources:
Fighters over the Desert - Christopher Shores and Hans Ring, 1969 Neville Spearman Limited, London