21 August

Jul

1 July

August

Sep

1 September

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

1

2

3

4

Other dates

Lonsdale Battalion events that took place on 21 August.
For events that took place elsewhere, see 21 August on The Great War wiki.

1914

Western Front

• Belgians forced to abandon their trenches at Namur.
• Battle of Charleroi, between Mons and the Meuse, between French and Germans begins.
• British move towards Mons.

Eastern Front

• East Prussia: Advance of Second Army under Samsonov; occupation (August 21-23) of Allenstein, Neidenburg, Soldau, Johannisburg, etc.

Naval and Overseas Operations

• South Africa invaded by German troops.

References/notes

Lord Edward Gleichen (1918–1920). Chronology of the War. Volumes I, II & III. Constable & Company, London. (Copyright expired)