| 100% | YSER | 4 | River flooded in W.W. I to thwart the Germans |
| 55% | YSER | 4 | River intentionally flooded in W.W. I |
| 55% | YSER | 4 | River deliberately flooded in W.W. I |
| 49% | SPEE | 4 | German vice admiral killed in W.W. I's Battle of the Falklands |
| 44% | YSER | 4 | River in W.W. I fighting |
| 42% | SOMME | 5 | French river in W.W. I news |
| 42% | MARNE | 5 | French river in W.W. I fighting |
| 42% | YSER | 4 | WWI battle named after the river where the German Army was obstructed by opening sluices and flooding land to the west |
| 41% | YSER | 4 | Belgian river deliberately flooded during W.W. I |
| 41% | SAVA | 4 | River rising in Slovenia that flows to the Danube at Belgrade |
| 41% | WAR | 3 | One of the W's in W.W. I |
| 40% | UBOAT | 5 | Threat to the Allies in W.W. II |
| 40% | NECKAR | 6 | German river rising in the Black Forest that joins the Rhine at Mannheim |
| 39% | EDER | 4 | German river to the Fulda |
| 39% | RUHR | 4 | German river to the Rhine |
| 39% | DSC | 3 | Medal awarded to MacArthur in W.W. I and W.W. II |
| 39% | DEMERARA | 8 | River in Guyana flowing north to the Atlantic at Georgetown |
| 39% | SOMME | 5 | French river in fierce W.W. I fighting |
| 39% | YSER | 4 | Belgian river in a W.W. I battle |
| 39% | KALUGA | 6 | City in W Russia on the Oka River |
| 39% | ELBE | 4 | German river to the North Sea |
| 39% | RHINE | 5 | German river to the North Sea |
| 39% | DRIN | 4 | River rising in Macedonia that flows through Albania to the Adriatic |
| 39% | EBRO | 4 | River in Spain that flows to the Mediterranean southwest of Tarragona |
| 39% | UGIE | 4 | River in Scotland that flows to the North Sea at Peterhead |
| 39% | WESER | 5 | River in Germany that flows to the North Sea at Bremerhaven |
| 39% | SIRET | 5 | River rising in Ukraine that flows through Romania to the Danube |
| 38% | LIPETSK | 7 | Health resort in W Russia on the Voronezh River |
| 38% | ACHERON | 7 | River to the underworld, in Greek myth |
| 38% | SAINTMAURICE | 12 | River rising in Quebec, Canada, that flows to the St Lawrence at Trois-Rivieres |