SPRING
Second Battle of Arras (9 Apr-16 May 1917)
Background
Fr., Br. & Russ. planned a joint attack, but Russ. withdrew & Ger. pulled back to Hindenburg Line, ruining plans.
Despite talk of 'war of attrition', commanders still sought a breakthrough.
Fr. Gen. NIVELLE believed he could break through on River Aisne, persuaded Britain to launch a diversion at Arras.
Events
Br. made longest advance since trench warfare began, incl. Canadian victory at VIMY RIDGE (9-12 Apr).
Helped by:
1. Army Improvements: better tactics (CREEPING barrage, 'leap FROG', 'bite & HOLD', mining, aerial recon). Canadian cmdrs studied Verdun & Somme.
2. Ger. mistakes: struggling to org. new defences & saw Vimy Ridge as less imp., so did not try to recapture.
Results
Cost 160k Br. casualties. Battle bogged down into costly, pointless attacks. Haig called it off.
FLANDERS
Two main causes:
1. Nivelle's Aisne Offensive (Apr-May) failed → MUTINY (nearly 50% of Fr. infantry divs refused to attack). Allies looked to Britain to divert Ger. forces.
2. Ger. U-BOAT campaign caused shortages in Britain. Success along the coast could deny them Ostend & Zeebrugge. Haig also hoped for a breakthrough.
Battle of Messines (7-14 Jun 1917)
Attack launched at MESSINES RIDGE as it could be organised quickly & was a key vantage point.
Success due to Army Improvements: detailed maps, better SPOTTING, mining, tanks & overhead barrage.
Ger. losses: c.25k (7k POWs, 3k missing). Allied losses: 25k (notably at HILL 60).
Battle of Passchendaele (Jul-Nov 1917)
Background
Third Battle of Ypres (PASSCHENDAELE).
v. dangerous surrounded on 3 sides by Ger. artillery. Ger. trenches (FLANDERNSTELLUNG) v. strong.
Lloyd George & Foch opposed attack, preferring to wait for US forces (declared war in Apr). Haig pushed ahead.
Haste may be due to Russ. defeat (1917) → battle-hardened Ger. troops could soon arrive from Eastern Front.
Events
Series of battles (Pilckem Ridge, Langemarck, Menin Rd, Polygon Wood) some success, but all v. costly.
Fighting infamous for deep mud (as in 2008 film).
Results
Casualty figures debated, but both sides lost at least 250k men.
Regarded as Allied success as Ger. could not afford such losses.
Though planned as a breakthrough, it became a war of attrition, wearing down the Ger. army.
Battle of Cambrai (20 Nov3 Dec 1917)
Background
Cambrai = key Ger. supply/comm. hub. Attack later criticised but was logical.
Surprise attack w. 476 tanks smuggled in (labelled 'WATER TANKS').
Used latest COMBINED ARMS tactics (all combat branches co-ordinated).
Events
1st day = major success, 5-mile advance. Some Ger. troops fled.
Tanks slow & vulnerable 280 destroyed or broke down. Over half lost by days end.
Ger. counterattack used new STORMTROOPER tactics. Br. badly defeated. Haig ordered withdrawal.
Results
Br. casualties: 75k. Ger.: just over 50k.
However, Cambrai marks end of static warfare (191517) w. new tactics on both sides.
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