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The specific time at which deployment for an operation commences. (US) L-Day For "Landing Day", 1 April 1945, the day Operation Iceberg (the invasion of Okinawa) began. [5] M-Day The day on which mobilization commences or is due to commence. (NATO) N-Day The unnamed day an active duty unit is notified for deployment or redeployment. (US) O-Day
The final bugle call of the day on military installations, Taps is played at military bases as a signal to service members that it is quiet time or “lights out”. The time varies between branches and individual bases: either 21:00, 22:00, or 23:00 (9, 10, or 11pm).
An order issued by public authorities or military forces requiring everyone or certain people to be indoors at certain times, often at night. It can be imposed to maintain public order (as was the case with the northeast blackout of 2003 , the 2005 French riots , the 2010 Chile earthquake , the 2011 Egyptian revolution , and the 2014 Ferguson ...
Night combat is combat that occurs during the hours of darkness. It is distinguished from daytime combat by lower visibility and its reversed relation to the circadian cycle . Typically, night combat is favorable to the attacker, with offensive tactics being focused on exploiting the advantages to maximum effect.
The time of day is typically expressed in English in terms of hours. Whole hours on a 12-hour clock are expressed using the contracted phrase o'clock, from the older of the clock. [6] (10 am and 10 pm are both read as "ten o'clock".) Hours on a 24-hour clock ("military time") are expressed as "hundred" or "hundred hours".
A dog watch is a work shift, also known as a "watch", in a maritime watch system that is half the length of a standard watch period. This is typically formed by splitting a single four-hour watch period between 16:00 and 20:00 (4 pm and 8 pm) to form two two-hour dog watches, with the "first" dog watch from 16:00 to 18:00 (4 pm to 6 pm) and the "second" or "last" dog watch from 18:00 to 20:00 ...
The term was mentioned for the first time in 1596. The Saxon major Hans von Fleming described this military custom for the first time in detail in his book Der vollkommene deutsche Soldat (The Perfect German Soldier, 1726). The Zapfenstreich was a trumpet signal to end the selling of liquor in the military quarters and to prepare for lights out.
Twenty-four-hour analog clocks and watches are used today by logistics workers, fire fighters, police officers, paramedics, nurses, pilots, [1] scientists, [2] and the military, [3] and are sometimes preferred because of the unambiguous representation of a whole day at a time. Note that this definition refers to the use of a complete circular ...