when a person in the military is temporarily deployed for a year, aka being sent overseas, generally without the rest of the family
Temporary DutY
Temporary Duty
The approving authority for permissive TDY (Temporary Duty) varies depending on the branch of the military and the specific circumstances. Generally, it will be a supervisor or commander who has the authority to approve travel and expenses. It is recommended to refer to the military regulations or guidelines for specific details.
I use virtually uncrackable ones. I was in the military for 12 years and went on many TDY assignments. I insert date I went in 4 digits, name of TDY base and when i left in 4 digits. I change to another each 3 months.
Why US troops at Thailand tdy's in Vietnam 1962?
It is not a military custom it's a military command, 'stand at ease' means to relax from the 'stand to attention' command.
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As of July 2014, the market cap for Teledyne Technologies Incorporated (TDY) is $3,549,637,877.94.
Depending on how it's used, it could stand for "Military Specification", meaning the ability to withstand shock, dust, or harsh environments.
Military Specification
tdy
MPO stand for Military Police Officers.