The Battle of France began on 10 May with the German invasion of the Low Countries.
The BEF followed the pre-arranged Plan D and advanced into Belgium to take up defences along the Dyle.
1 AA Brigade's role was to defend the routes forward, protecting roads and bridges, artillery concentrations, HQs and supply dumps.
6th HAA Regiment moved up as part of this advance, split into detachments.
On 13 May, B Section of 12 Bty brought down a Junkers Ju 88, and later B and C Sections hit three low-flying Dornier Do 17s and believed they had brought one down.
On 15 May B and D shot down another Ju 88.

However, on that day a German breakthrough in the Ardennes forced the BEF to fall back again.
 While 15 Bty remained in the Ypres area, 3 and 12 Btys fell back.
As the situation deteriorated, HAA guns were also used in an anti-tank role.
On 19 May one Troop knocked out two German Panzers, but the HAA guns could not be withdrawn and had to be disabled.
On 20 May D Section was relocated to defend the canal bridge at Svegegham and came under attack as low-flying bombers attempted to destroy the bridge, without success on either side.
On 21 May 15 Bty was ordered to detach a party with Bren guns to assist in defending Vimy Ridge; the battery finally got away from Ypres on 22 May while the city was under heavy bombing.
Deploying south of Lille the battery got its first confirmed 'kill' when A Section scored a direct hit on a Ju 88 at 8000 feet while conducting barrage fire.

By now the main body of the BEF was cut off and making for Dunkirk to be evacuated (in Operation Dynamo).
15 Battery set up near the perimeter and tried to hit a Heinkel spotter aircraft before switching fire to a low-flying bomber attacking a nearby Bofors gun position; it hit this aircraft with Shrapnel shell and brought it down.
3 Battery reached Armentières on 23 May, by which time the Dunkirk perimeter was shrinking.
On 27 May the regiment was ordered to destroy all transport and stores other than those attached to the guns, and the following day the (mistaken) order was received to destroy all guns and instruments.
B Section did not receive the order, and continued to fire from La Panne until out of ammunition.
Many of the regiment's gunners were got away from the beaches at La Panne and Bray-Dunes, some aboard  the Royal Daffodil.
The Battle of France began on 10 May with the German invasion of the Low Countries. The BEF followed the pre-arranged Plan D and advanced into Belgium to take up defences along the Dyle. 1 AA Brigade's role was to defend the routes forward, protecting roads and bridges, artillery concentrations, HQs and supply dumps. 6th HAA Regiment moved up as part of this advance, split into detachments. On 13 May, B Section of 12 Bty brought down a Junkers Ju 88, and later B and C Sections hit three low-flying Dornier Do 17s and believed they had brought one down. On 15 May B and D shot down another Ju 88.
However, on that day a German breakthrough in the Ardennes forced the BEF to fall back again.  While 15 Bty remained in the Ypres area, 3 and 12 Btys fell back. As the situation deteriorated, HAA guns were also used in an anti-tank role. On 19 May one Troop knocked out two German Panzers, but the HAA guns could not be withdrawn and had to be disabled. On 20 May D Section was relocated to defend the canal bridge at Svegegham and came under attack as low-flying bombers attempted to destroy the bridge, without success on either side. On 21 May 15 Bty was ordered to detach a party with Bren guns to assist in defending Vimy Ridge; the battery finally got away from Ypres on 22 May while the city was under heavy bombing. Deploying south of Lille the battery got its first confirmed 'kill' when A Section scored a direct hit on a Ju 88 at 8000 feet while conducting barrage fire.
By now the main body of the BEF was cut off and making for Dunkirk to be evacuated (in Operation Dynamo). 15 Battery set up near the perimeter and tried to hit a Heinkel spotter aircraft before switching fire to a low-flying bomber attacking a nearby Bofors gun position; it hit this aircraft with Shrapnel shell and brought it down. 3 Battery reached Armentières on 23 May, by which time the Dunkirk perimeter was shrinking. On 27 May the regiment was ordered to destroy all transport and stores other than those attached to the guns, and the following day the (mistaken) order was received to destroy all guns and instruments. B Section did not receive the order, and continued to fire from La Panne until out of ammunition. Many of the regiment's gunners were got away from the beaches at La Panne and Bray-Dunes, some aboard  the Royal Daffodil.
6th Heavy Anti-Aircraft Regiment, Royal Artillery