THE PHASES OF THE BATTLE OF ATTRITION.
NORTH OF THE SOMME.
The Franco-British troops enlarge the conquered positions and attack the centres of resistance: Combles and Thiepval (July 14—September 1).
Combles and Thiepval turned and conquered, after being surrounded (September—November).
The Allies advance toward their main objectives: Bapaume and Péronne (November—March).
SOUTH OF THE SOMME.