Voi

Voi is a current-day market city in Kenya, Africa, and is part of the plot of Halo 3.

Location
It is nearby New Mombasa, Kenya, and serves as the crossroads for railway lines between three Kenyan cities, including New Mombasa and Nairobi.

Topography
Voi is described in its concept art to be a "worker town", and is filled with mechanical factories and shoreline buildings. It is littered with the remains of the New Mombasa Orbital Elevator, which is scattered across the level.

Halo 3
Three successive Halo 3 campaign levels - Tsavo Highway, The Storm and Floodgate, take place in or around Voi. The multiplayer map Foundry is set in a Voi warehouse.

Tsavo Highway , the third campaign level, takes place along the road to Voi, as does most of the following level The Storm in which the Master Chief must defeat a Scarab.

The Storm deals mainly with the character assaulting Covenant forces entrenched in Voi.

 Floodgate deals with clearing the Flood from the city, although the city is eventually destroyed.

Battle of Voi
The Master Chief arrives in Voi via Tsavo Highway and joins up with the Arbiter and a large group of Marines. The Battle of Voi begins with the UNSC attacking entrenched Covenant Loyalist forces. Together they destroy many Anti-Air Wraiths, a Scarab, and a Covenant anti-air gun. With the anti-air forces destroyed, Lord Hood's ships begin to attack the High Prophet of Truth's Forerunner Dreadnought, until Truth activates the portal to the Ark and escapes. After this, a damaged Covenant Cruiser crashes in the middle of the city. This ship is full of Flood, and the Master Chief and the Arbiter begin to fight this new threat. They start to move to the downed Cruiser, hoping to destroy it and contain the Flood. As they near the Cruiser, a Covenant Separatist ship arrives, led by Shipmaster Rtas 'Vadum. The ship, the Shadow of Intent, deploys Elite ground forces to assist the humans. The humans learn that the Separatists are looking for Cortana, who is supposedly aboard the Flood Cruiser. Separating from the Arbiter, the Chief goes aboard the Cruiser. What he finds is not Cortana, but a damaged message left by her. As he is inspecting it, 343 Guilty Spark arrives to repair "Cortana." All human and Elite forces retreat to the Shadow of Intent as 'Vadum glasses Voi and half of Africa, therefore destroying all Flood in the vicinity.

Trivia

 * Voi was located relatively close to Old and New Mombasa. Yet, it was hardly damaged in the ensuing destruction left by the slipspace jump made by Regret's carrier.