The center of the town has kept its very bourgeois atmosphere, while more middle-class neighborhoods have developed around the train stations and in the outskirts of the city. Versailles is a chic suburb of Paris, well linked with the center of Paris by several train lines. However, the city is extremely compartmentalized, divided by large avenues inherited from the monarchy which create the impression of several small cities ignoring each other. Versailles was never an industrial city, even though there are a few chemical and food-processing plants. Essentially, Versailles is a place of services, such as public administration, tourism, business congresses, and festivals. From 1951 until France's withdrawal from the NATO unified command in 1966, nearby Rocquencourt functioned as the site for SHAPE. Versailles is an important military center, with several units and training schools headquartered at the Satory military base, which hosted the headquarters of the famed 2nd French Armored Division until 1999, and where a military exhibition is organized annually.