| CAMBRAI | World War I battle on the Western Front in 1917 which saw the first effective large-scale use of tanks (7) |
| SOMME | 1916 141-day battle on the Western Front (5) |
| SALK | Jonas , virologist who developed the first effective polio vaccine (4) |
| AMINOR | Its scale uses no black keys |
| LITTLEBIGHORN | 1876 battle which saw the defeat and killing of General Custer (6,7) |
| PLIOCENE | Geological era which saw the joining of the Americas (8) |
| SALKVACCINE | First effective medication against polio, named after its inventor (4,7) |
| FOCH | Ferdinand, marshal of France who was commander in chief of Allied armies on the Western front in the First World War (4) |
| PARTRIDGE | Grey -; gathering on the ground in a covey, a farmland game bird that thrived on the Western Front in no-man's-land during the First World War (9) |
| VIMYRIDGE | Escarpment on the northern flank of the Arras front that gave its name to a World War I battle in April 1917 (4,5) |
| TANNENBERG | World War I battle in East Prussia resulting in the suicide of the Russian army's commander Alexander Samsonov |
| LOOS | First World War battle saw the first use of poison gas by the Allies (4) |
| CRECY | Battle that saw the first major English victory on land during the Hundred Years' War (5) |
| TOBRUK | Small port in north east Libya which saw severe fighting in the Second World War (6) |
| ESCOBAR | Notorious Colombian drug lord who died in a gun battle on the roof tops of Medellin in 1993, Pablo . |
| GALLIPOLI | World War I battle of the Dardanelles (9) |
| ARGONNE | French forest that was the site of a World War I battle |
| INDIAN | Nationality of the actress who won Celebrity Big Brother in 2007, which saw Jade Goody return to the house (6) |
| BOWER | Shelter at the Western front in an old war |
| PASSCHENDAELE | 1917 World War I battle site (13) |
