In an interesting variation of a blue-on-blue encounter a pilot of 45Sqn RFC in Italy .
The pilot in question was Ray Brownell an Australian in the RFC. *In his book "From Khaki to Blue" he states he was flying over Venice on 5 March 1918 when he was attacked by an Italian fighter. He tried to show his cockades to the attacking fighter to no avail. *Deciding to take a more agressive stance he fought it for a period of time and shot away its aileron controls, purposely missing the cockpit, until the Italian flopped into the water.
The story is also repeated in
Norman MacMillan's book "Offensive Patrol".
Somebody once sent me the Italian side of the story where the pilot claimed HE was minding his own business when the British Camel with "dumbbell" markings came up and shot him down.
Altogether a fascinating story.