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.