Question: REV Group (formerly Allied Specialty Vehicles) is an American manufacturer of specialty vehicles the in Fire & Emergency, Recreational Vehicles, and Bus & Industrial sectors, it was formed in which year, by American Industrial Partners' merging of four companies, one being Collins Industries, a Hutchinson, Kansas company that specializes in manufacturing of Type A and Type B school buses, and also manufactures ambulances and other special-purpose vehicles?

Context paragraphs:
Crestline Coach: Crestline Coach Ltd. is an ambulance manufacturer located in Saskatoon, Saskatchewan, Canada, with offices in Alberta, Manitoba, Ontario, Quebec,and California.  The company manufactures ambulances and specialty vehicles, and also distributes buses.  The company has manufactured vehicles that have been sold into every province in Canada, the Canadian Department of National Defense as well as exported to Belgium, Brazil, Brunei, Chile, China, Colombia, Cuba, Ireland, Italy, Jordan, Korea, Kyrgyzstan, Malta, Mexico, Netherlands, Paraguay, Siberia, St Lucia, Sudan, Switzerland, United States and Vietnam.

REV Group: REV Group (formerly Allied Specialty Vehicles) is an American manufacturer of specialty vehicles the in Fire & Emergency, Recreational Vehicles, and Bus & Industrial sectors.  It was formed in 2010 by American Industrial Partners' merging of four companies: Collins Industries (buses and ambulances), E-One (firetrucks), Halcore Group and Fleetwood Enterprises (RVs). The company has yearly revenue of over $1 billion.  The company is led by Timothy Sullivan, CEO, formerly of Bucyrus International.  Allied Specialty Vehicles changed its name to REV Group on November 1st, 2015.

Collins Industries: Collins Industries (or Collins Bus Corporation) is a Hutchinson, Kansas company that specializes in manufacturing of Type A and Type B school buses, and also manufactures ambulances and other special-purpose vehicles.  The company was founded in 1971 and as of 1998 it was made up of four subsidiaries: Collins Bus Corporation, Wheeled Coach Industries, Inc.; World Trans, Inc. and Capacity of Texas, Inc.  The company has about 900 employees, in three manufacturing facilities.

Crown Supercoach: The Crown Supercoach is a bus that was constructed and marketed by Crown Coach Corporation from 1948 to 1991.  While most examples were sold as yellow school buses, the Supercoach formed the basis for motorcoaches and other specialty vehicles using the same body and chassis.  While technically available outside of the West Coast, nearly all Crown school buses were sold in California, Washington State, and Oregon.

Monaco Coach Corporation: Monaco is a recreational vehicle (RV) brand, manufactured in Decatur, Indiana, by REV Group.  Monaco holds an iconic portfolio of popular Class A Diesel motorhomes, including Diplomat and Dynasty.  Monaco is led by Monaco President, Mike Snell, and Allied Recreation Group President, Jim Jacobs.  Allied Recreation Group is a subsidiary of Allied Specialty Vehicles.

Fleetwood Enterprises: Fleetwood Enterprises, Inc. was a producer of recreational vehicles (RVs), mobile homes, and manufactured housing.  Founded in 1950, after a series of financial difficulties in the 21st century, the company was broken up, with manufactured housing bought by Cavco Industries and RVs incorporated by a private equity firm into what became Allied Specialty Vehicles which has now formed as a collective manufacturer for Fleetwood RV, American Coach, Monaco, Holiday Rambler, and Trek recreational vehicle brands.

Cutaway van chassis: Cutaway van chassis are used by second stage manufacturers for a wide range of completed motor vehicles. Especially popular in the United States, they are usually based upon incomplete vans made by manufacturers such as Chrysler Group LLC, Ford Motor Company, and General Motors which are generally equipped with heavier components than most of their complete products.  To these incomplete vehicles, a second stage manufacturer adds specific equipment and completes the vehicle.  Common applications of this type of vehicle design and manufacturing includes small trucks, school buses, recreational vehicles, minibuses, and ambulances.  The term "cutaway" can be somewhat of a misnomer in most of the vehicle's context since it refers to truck bodies for heavy-duty commercial-grade applications sharing a common truck chassis.

Blue Bird Corporation: The Blue Bird Corporation (originally known as the Blue Bird Body Company) is an American bus manufacturer headquartered in Fort Valley, Georgia.  Best known for as a manufacturer of school buses, the company has also manufactured a wide variety of other bus types, including transit buses, motorhomes, and specialty vehicles such as mobile libraries and mobile police command centers.  Currently, Blue Bird concentrates its product lineup on school and activity buses and specialty vehicle derivatives.

Blue Bird Mini Bird: The Blue Bird Mini Bird was a Type B school bus built by Blue Bird Corporation, introduced in 1977.  It was dropped in the early 2000s as market tastes shifted away from Type B school buses.

ElDorado National: ElDorado National is an American bus manufacturer owned by REV Group (NYSE: REVG).  Heavy-duty buses are built in Riverside, California, and cutaway buses and mobility vans are built in Salina, Kansas.  It was owned by Thor Industries, but sold to Allied Specialty Vehicles (ASV) in August 2013.

Supporting paragraphs: REV Group Collins Industries
Answer: 2010