System: Wei

The planet Wei started as an agricultural world, supplying worlds around it with the necessities of life. It was also an important source of ores and minerals including iron, gold, copper and titanium. What it became was a repository for nerve gas agents for the Star League and then the Capellan Confederation. Certain plants were discovered to produce chemical compounds that, when combined, produced deadly nerve agents.

Wei has one very large continent, Province, which covers almost 33 percent of the planet's surface. It is centered in the equatorial region and extends from the northern hemisphere southeast to the southern hemisphere. It is in the southern reaches of Province that the poison-producing plants are grown. The planetary capital, Vandannis City, is located in Vandannis Valley, a very large valley in the center of the continent.

Here the infamous Wei gas (its military designation: UrbStryc-A) was manufactured in a secret base located at Bonganville. Wei gas was designed to kill immediately and for easy cleanup. During the Fourth Succession War, Davion forces found out about this gas the hard way. Even those secure in their tanks or BattleMechs found that the gas trapped in air filters would evaporate due to the heat, then release itself as minute particles into the air circulation system. In the end, Wei gas cost the invaders two full battalions of troops. During the Capellan-St. Ives war Wei gas was used by Thuggee Cult terrorists, this time in major population centers of St. Ives, including the capital city, Milos, and Indicass. Thousands died as a result of the gas.

There are no functional factories located on this planet.