Wew, lad - you forgot the sauce! Go here:
https://search.usa.gov/search?utf8=✓&affiliate=jointchiefsofstaff&query=Memorandum+for+the+Joint+Force
Dont come back until you find that 'official' letter posted there
Got some very low IQ folks here tonight. Wipe your chin
Here is the link - letter is NOT there
https://search.usa.gov/search?utf8=✓&affiliate=jointchiefsofstaff&query=Memorandum+for+the+Joint+Force
Here. Link.
https://search.usa.gov/search?utf8=✓&affiliate=jointchiefsofstaff&query=Memorandum+for+the+Joint+Force
GO FIND THE LETTER. Don't come back til you have found it
Go find it then. On their site
https://search.usa.gov/search?utf8=✓&affiliate=jointchiefsofstaff&query=Memorandum+for+the+Joint+Force