The document discusses Japanese codes and ciphers used during World War 2. It mentions Japanese Morse code, the Purple coding machine, Type-B machines, and how codes were used leading up to and during the attack on Pearl Harbor. It also discusses the death of Admiral Yamamoto and the use of Navajo code talkers.

1. THE PACIFIC WAR AND
JAPANESE CODES

3. THE LIFE THAT I HAVE
The life that I have
Is all that I have
And the life that I have
– Is yours
The love that I have
Of the life that I have
Is your and yours and yours
A sleep I shall have
A rest I shall have
Yet death will be but a pause
For the peace of my years
In the long green grass
Will be yours and yours and yours

4. TRANSPOSITION CIPHER

5. KAMASUTRA

6. SUBSTITUTION CIPHER

7. SAMUEL PEPYS

8. LETTER FREQUENCY IN
ENGLISH

10. JAPANESE MORSE CODE

11. GCHQ

12. ERIC NAVE

13. JAPANESE PURPLE CODING
MACHINE

14. ADMIRAL DONITZ

15. JAPANESE TYPE-B MACHINE

16. RING USED FOR DECODING

17. WIRELESS INTERCEPTION

18. ATTACK ON PEARL HARBOUR

20. DEATH OF YAMAMOTO

21. NAVAJO CODE TALKERS