21 October

Sep

1 September

October

Nov

1 November

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 October.
For events that took place elsewhere, see 21 October on The Great War wiki.

1916

This section requires expansion.  (20 July, 2016)

1917

This section requires expansion.  (20 July, 2016)