Complex sentence: Every fighter and fighter-bomber unit ("Geschwader ") currently occupied with air defence along the Western Front was deployed, and additional night-fighter units ("Nachtjagdgeschwader ") and medium bomber units ("Kampfgeschwader") acted as pathfinders.
Split into simpler sentences: Every fighter and fighter-bomber "Geschwader" (Wing) currently occupied with air defence along the Western Front was redeployed. Additional night-fighter units ("Nachtjagdgeschwader ") and medium bomber units ("Kampfgeschwader") acted as pathfinders.