Siege

A siege is a military blockade of a city or fortress with the intent of conquering by attrition or assault. The term derives from sedere, Latin for "to sit". Siege warfare is a form of constant, low-intensity conflict characterized by one party holding a strong, static defensive position. Consequently, an opportunity for negotiation between combatants is not uncommon, as proximity and fluctuating advantage can encourage diplomacy.

A siege occurs when an attacker encounters a city or fortress that cannot be easily taken by a coup de main and refuses to surrender. Sieges involve surrounding the target and blocking the reinforcement or escape of troops or provision of supplies (a tactic known as "investment"), typically coupled with attempts to reduce the fortifications by means of siege engines, artillery bombardment, mining (also known as sapping), or the use of deception or treachery to bypass defences. Failing a military outcome, sieges can often be decided by starvation, thirst, or disease, which can afflict either the attacker or defender. This form of siege, though, can take many months or even years, depending upon the size of the stores of food the fortified position holds. During the process of circumvallation, the attacking force can be set upon by another force of enemies due to the lengthy amount of time required to starve a position. A defensive ring of forts outside the ring of circumvallated forts, called contravallation, is also sometimes used to defend the attackers from outside enemy forces.

Tom Clancy's Rainbow Six

Tom Clancy's Rainbow Six is a media franchise created by American author Tom Clancy about a fictional international counter-terrorist unit called "Rainbow." The franchise began with Clancy's novel Rainbow Six, which was adapted into a successful series of tactical first-person shooter video games.

Team Rainbow

Rainbow Six describes Rainbow as an international counter-terrorism operation hosted by NATO and funded by money funneled through the U.S. Department of the Interior.

The base of operations for Rainbow is located in Hereford, England (at the time, home to the SAS), due to the United Kingdom being one of the most accessible countries in the world and having one of the world's foremost special forces units. Most of the characters in Rainbow are American or British, though the NATO countries of France, Germany, Italy, Spain, Canada, and the NATO ally of Israel have at least one representative each.

Tom Clancy's Rainbow Six Siege

Tom Clancy's Rainbow Six Siege is a first-person shooter video game developed by Ubisoft Montreal and published by Ubisoft. Considered as a successor to the now cancelled Tom Clancy's Rainbow 6: Patriots, Siege puts heavy emphasis on environmental destruction and co-operation between players. Unlike previous entries in the series, the title has missions known as "situations" as well as an online mode.

Gameplay

Tom Clancy's Rainbow Six Siege is a first-person tactical shooter, in which players take control of an operator from the Rainbow team, a counter-terrorist unit. Different operators have different races, perks, bombs and gadgets. The game features an asymmetrical structure whereby the teams are not always balanced in their ability choices. The operators belong to the counter-terrorism units SWAT, SAS, GSG-9, Spetsnaz and GIGN, each of which has four operators. Canadian operators from Joint Task Force 2 have been added in a recent update. Players also have access to a "Recruit" operator whose gear and gadgets can be customized. Players pick an operator from any unit before a round starts, and are not allowed to change operators during a round. An in-game shop allows players to purchase operators using the in-game currency "Renown", which is earned from actions performed in-game. Each successive operator that is purchased from a single counter-terrorist unit costs an additional 500 Renown.

Rainbow

A rainbow is a meteorological phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky. It takes the form of a multicoloured arc. Rainbows caused by sunlight always appear in the section of sky directly opposite the sun.

Rainbows can be full circles; however, the average observer sees only an arc formed by illuminated droplets above the ground, and centred on a line from the sun to the observer's eye.

In a primary rainbow, the arc shows red on the outer part and violet on the inner side. This rainbow is caused by light being refracted when entering a droplet of water, then reflected inside on the back of the droplet and refracted again when leaving it.

In a double rainbow, a second arc is seen outside the primary arc, and has the order of its colours reversed, with red on the inner side of the arc.

Overview

A rainbow is not located at a specific distance from the observer, but comes from an optical illusion caused by any water droplets viewed from a certain angle relative to a light source. Thus, a rainbow is not an object and cannot be physically approached. Indeed, it is impossible for an observer to see a rainbow from water droplets at any angle other than the customary one of 42 degrees from the direction opposite the light source. Even if an observer sees another observer who seems "under" or "at the end of" a rainbow, the second observer will see a different rainbow—farther off—at the same angle as seen by the first observer.