DETROIT — General Motors’ announcement Monday that it is parting ways with its Opel and Vauxhall brands after nearly 90 years of part ownership marks a historic decision that changes the complexion of the European automotive industry.

Here is a look at Opel and Vauxhall. First, some key facts:

•Headquartered in Rüsselsheim, Opel operates 12 plants and four development and test centers in eight European countries.

•Opel employs around 34,500 people in Europe, with more than 16,500 in Germany.

•Opel and Vauxhall sell vehicles in over 50 countries.

•In 2016 Opel/Vauxhall sold more than 1.1 million passenger cars and light commercial vehicles.

•GM Europe reported a pre-tax net loss of $863 million (813 million euro).for 2016 on revenue of $19.9 billion (18.7 billion euro).

History:

1862: After years of employment as a journeyman metalworker, Adam Opel goes into business in his hometown of Rüsselsheim, Germany. There, he builds his first sewing machine, laying the foundation for the Opel company.

1886: Opel begins making bicycles.

1899: Opel begins making cars.

1903: British automaker Vauxhall begins producing its first car, a six horsepower vehicle with its slow-revving single cylinder engine and a wood and steel chassis.

1910: The Vauxhall Prince Henry was enjoyed by wealthy customers who regarded sporting motoring as something of an adventure coupled with an interest in new technology.

1920: The first works council is established at Opel.

1925: GM buys Vauxhall for $2.5 million in a deal encouraged by GM President Alfred P. Sloan. The first Vauxhall made under GM was a short wheelbase 21 horsepower model.

1928: With a market share of 37.5 percent, Opel is by far the largest German carmaker. In preparation for an alliance with General Motors, the company is converted into a listed stock corporation.

1929: General Motors acquires 80% of shares in the company Adam Opel AG for just under $26 million, becoming majority stockholder.

1931: The Rüsselsheim plant builds the first “people’s automobile”, an affordable vehicle equipped with a 1.2-liter engine. Between 1931 and 1935, 100,000 units are built – a volume never before reached with a single model in Germany.

GM acquires the remaining 20% of shares in the Opel corporation.Opel becomes the first carmaker to establish a school for customer service training.

1938: The Vauxhall Ten-Four was the first British car with unibody construction.

1939: Four years of work was compressed into one in the design and development of Vauxhall’s war-time production tank – the Churchill Marks I – III. The Mark III Churchill of 1942 was the only British tank whose armor could withstand the German Tiger tank’s 88mm tungsten carbide shot.

1940: Production of the one-millionth Opel, a Kapitän model. In October, a directive from the Nazi regime brings passenger-car production to a standstill. In addition to truck models, including four-wheel drive and track versions, military equipment such as landing gear, cockpits, and fuel tanks for aircraft etc. are produced.

1948: The Rüsselsheim plant resumes production of the Kapitän, which enjoys a popular comeback.

1959: Production of Frigidaire household refrigerators ends.

1972: With a market share of 20.4%, Opel is the largest German automobile manufacturer.

1975: The Vauxhall Cavalier, one of the brands most successful models, is launched.

1991: The Opel Astra is launched.

1998: New corporate headquarters are established in Rüsselsheim: the Adam Opel Building is inaugurated by German Chancellor Helmut Kohl.

2006: GM Europe opens a new European Design Center in Rüsselsheim.

2009: The Opel Ampera, the cousin of the extended-range electric vehicle Chevrolet Volt, is presented at the Geneva Motor Show.

Sources: Opel and Vauxhall web sites, GM annual report.