100% | EBRO | 4 | River that was the ancient dividing line between Rome and Carthage |
46% | TWRCH | 5 | River that formed the ancient boundary between Brecknockshire and Carmarthenshire |
40% | PUNICWARS | 9 | Ancient conflicts between Rome and Carthage |
38% | MORAVA | 6 | River that forms the border between Slovakia and Austria |
38% | AMUR | 4 | River that forms the boundary between Manchuria and Russia |
38% | MEKONG | 6 | River that forms the border between Laos and Myanmar |
37% | DRINA | 5 | River that forms the boundary between Bosnia and Herzegovina and Montenegro |
37% | ODER | 4 | River that forms part of the border between Germany and Poland |
37% | TAMAR | 5 | River that forms most of the border between Cornwall and Devon |
37% | ORINOCO | 7 | River that forms part of the border between Colombia and Venezuela |
37% | MOSELLE | 7 | River that forms part of the border between Germany and Luxembourg |
37% | DOURO | 5 | River that forms part of the border between Spain and Portugal |
37% | LIMPOPO | 7 | River that serves as the border between Zimbabwe and South Africa |
37% | RIONEGRO | 8 | River that forms part of the border between Colombia and Venezuela |
36% | ELBE | 4 | River that formed part of the border between East and West Germany |
36% | YALU | 4 | River that forms a large part of the border between North Korea and China |
35% | RUBICON | 7 | Stream that formed the ancient boundary between Italy and Cisalpine Gaul |
35% | ETRURIA | 7 | Ancient region of central Italy between the Rivers Tiber and Arno |
35% | MESOPOTAMIA | 11 | Ancient region of SW Asia between the Rivers Euphrates and Tigris |
35% | UNA | 3 | 132 mile river that runs along the border between Bosnia and Herzegovina and Croatia |
34% | YSER | 4 | River that was the scene of WWI fighting |
34% | DOURO | 5 | River that forms part of the border between Spain and Portugal before flowing west to the Atlantic |
34% | WARM | 4 | The ___ Up, athletic-wear line that is a collaboration between actress Jessica Simpson and Macy's |
34% | THRACE | 6 | Ancient country west of the Black Sea now divided between Turkey, Bulgaria and Greece |
33% | MARNE | 5 | River that was the site of battles in both world wars |
33% | WYE | 3 | Maryland river that lent its name to the memorandum negotiated between Israel and the Palestinian Authority in 1998 |
33% | ARAS | 4 | 666 mile river that defines, in part, the border between Armenia and Turkey and also between Iran and Azerbaijan |
33% | ZAMBEZI | 7 | River that is bordered by Zambia and Zimbabwe |
32% | FROG | 4 | "___ and Toad are Friends," children's book that features a memorable friendship between the titular characters |
32% | ORANGE | 6 | River rising in the Drakensberg mountains that forms the boundary between South Africa and Namibia |