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The number 21 itself doesn't have significance, it's an agreed upon number. The use of gun salutes for military occasions is traced to early warriors who demonstrated their peaceful intentions by placing their weapons in a position that rendered them ineffective. Apparently this custom was universal, with the specific act varying with time and place, depending on the weapons being used. A North African tribe, for example, trailed the points of their spears on the ground to indicate that they did not mean to be hostile.

The tradition of rendering a salute by cannon originated in the 14th century as firearms and cannons came into use. Since these early devices contained only one projectile, discharging them once rendered them ineffective. Originally warships fired seven-gun salutes--the number seven probably selected because of its astrological and Biblical significance. Seven planets had been identified and the phases of the moon changed every seven days. The Bible states that God rested on the seventh day after Creation, that every seventh year was sabbatical and that the seven times seventh year ushered in the Jubilee year.

Land batteries, having a greater supply of gunpowder, were able to fire three guns for every shot fired afloat, hence the salute by shore batteries was 21 guns. The multiple of three probably was chosen because of the mystical significance of the number three in many ancient civilizations. Early gunpowder, composed mainly of sodium nitrate, spoiled easily at sea, but could be kept cooler and drier in land magazines. When potassium nitrate improved the quality of gunpowder, ships at sea adopted the salute of 21 guns.

The 21-gun salute became the highest honor a nation rendered. Varying customs among the maritime powers led to confusion in saluting and return of salutes. Great Britain, the world's preeminent seapower in the 18th and 19th centuries, compelled weaker nations to salute first, and for a time monarchies received more guns than did republics. Eventually, by agreement, the international salute was established at 21 guns, although the United States did not agree on this procedure until August 1875.

The gun salute system of the United States has changed considerably over the years. In 1810, the "national salute" was defined by the War Department as equal to the number of states in the Union--at that time 17. This salute was fired by all U.S. military installations at 1:00 p.m. (later at noon) on Independence Day. The President also received a salute equal to the number of states whenever he visited a military installation.

In 1842, the Presidential salute was formally established at 21 guns. In 1890, regulations designated the "national salute" as 21 guns and redesignated the traditional Independence Day salute, the "Salute to the Union," equal to the number of states. Fifty guns are also fired on all military installations equipped to do so at the close of the day of the funeral of a President, ex-President, or President-elect.

Today the national salute of 21 guns is fired in honor of a national flag, the sovereign or chief of state of a foreign nation, a member of a reigning royal family, and the President, ex-President and President-elect of the United States. It is also fired at noon of the day of the funeral of a President, ex-President, or President-elect.

Gun salutes are also rendered to other military and civilian leaders of this and other nations. The number of guns is based on their protocol rank. These salutes are always in odd numbers.

2007-03-17 13:22:04 · answer #1 · answered by The Scorpion 6 · 0 1

It's because back in the days of sailing ships, most British warships carried a broadside of 21 cannons. When they wanted to show an approaching friendly ship that they too were friendly and meant no harm, they would clear their guns, all 21 at once, and approach with weapons empty. The other ship would reciprocate. Hence, the 21 gun salute. Thus, it became a bit of a formal salute that ships would do for each other. I was more of a formality than anything else, of course. They would usually do it when they KNEW the other ship was friendly. Like I said, it was more of a formal salute than a show of good faith.

2007-03-17 20:29:31 · answer #2 · answered by The Man In The Box 6 · 1 0

The signifigance is that more guns uses too many bullets. Seriously. When the US was founded the Volley was one for every state. I believe it got up to 24 before the military relized they had to stop somewhere. 21 allows you to have three volleys of seven. Three is significant because in Roman times three handfulls of dirt were thrown into the grave by the widow to symbolize her burying her husband. 7 is significant for many reasons, not the least of which that it is found in the bible in many places, and is considered a lucky number.

2007-03-17 20:22:58 · answer #3 · answered by Chance20_m 5 · 0 1

3 and 7 are considered holy or lucky numbers and 3*7=21.

2007-03-17 20:32:45 · answer #4 · answered by gregory_dittman 7 · 0 2

Brian has it down
Here is more

2007-03-17 20:31:11 · answer #5 · answered by Anonymous · 0 1

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