| operation set | Operationsvorrat |
| operation sheet | Laufkarte |
| Operation Shingle | Operation Shingle |
| Operation Shylock. A Confession | Operation Shylock. Ein Bekenntnis |
| Operation Sledgehammer | Operation Sledgehammer |
| Operation Solo | Der Professionelle |
| Operation Sonderaktion Krakau | Sonderaktion Krakau |
| Operation Spark | Operation Iskra |
| Operation St. Peter's | Die Abenteuer des Kardinal Braun |
| Operation Starlite | Operation Starlite |
| Operation Stella Polaris | Operation Stella Polaris |
| Operation Storax | Operation Storax |
| Operation Storm | Militäroperation Oluja |
| Operation successful, patient dead! | Operation gelungen, Patient tot! |
| operation supervision | Betriebsüberwachung |
| operation support | Betriebsunterhaltung |
| Operation Tannenbaum | Operation Tannenbaum |
| Operation Tannenberg | Unternehmen Tannenberg |
| Operation Teapot | Operation Teapot |
| Operation Tempest | Operation Sturm |
| Operation Thunderbolt | Operation Thunderbolt |
| operation time | Arbeitszeit |
| Operation Time Bomb | Der Sturm bricht los |
| Operation Tinderbox | Operation Tinderbox |
| Operation to capture rebel leader surges violence in East Timor | Situation in Timor-Leste nach wie vor kritisch |
| Operation Toggle | Operation Toggle |
| operation tolerance | Betriebstoleranz |
| Operation Tonga | Operation Tonga |
| Operation Torch | Operation Torch |
| Operation Touchstone | Operation Touchstone |
| Operation Tumbler-Snapper | Operation Tumbler-Snapper |
| Operation Typhoon | Schlacht um Moskau |
| operation unit | Arbeitseinheit |
| Operation Upshot-Knothole | Operation Upshot-Knothole |
| Operation Walküre | Operation Walküre |
| Operation Weserübung | Unternehmen Weserübung |
| Operation Whetstone | Operation Whetstone |
| Operation Wigwam | Operation Wigwam |
| Operation Wisła | Akcja Wisła |
| Operation Wolf | Operation Wolf |
| Operation Wooden Leg | Operation Hölzernes Bein |
| Operation Wrath of God | Caesarea |
| Operation Yellow Viper | Die Schlangenbande |
| operation-standby | Betriebstoleranz |
| Operation: Daybreak | Das Sonderkommando |
| operational | in Betrieb |
| operational air reconnaissance | operative Luftaufklärung |
