1. Before the crash Fred had flown over 61 sorties on intruder operations . 2. In early 1943 the squadron began to switch over to night intruder operations . 3. On the 21st, seven aircrews relocated to B�ne in readiness for intruder operations over Sardinia. 4. The first such intruder operation took place on the night of 23 / 24 March 1943. 5. Defence soon gave way to offensive operations; fighter sweeps and intruder operations took place over France. 6. Haviland served throughout the war, doing tours as an instructor, intruder operations and bomber support. 7. Jagd-Division ( 3rd Fighter Division ), that a intruder operation be allowed to take place. 8. Intruder operation was conducted by P-47s and accurately preceded the bombers to strike fighters at Villaorba airfield.9. He also coordinated his efforts with No . 100 Group RAF, which were engaged in intruder operations over occupied Europe. 10. The end of August found a large detachment stationed in Cyprus with the main task of doing night intruder operations over Rhodes.