Brief History from Wikipedia
The IAV (Interim Armored Vehicle) Stryker is a family of eight-wheeled armored fighting vehicles derived from the Canadian LAV III. Stryker vehicles are produced by General Dynamics Land Systems Canada for the United Staes Army. It has 4-wheel drive (8×4) and can be switched to all-wheel drive (8×8). The vehicle is named for two unrelated U.S. soldiers who posthumously received the Medal of Honorr: Private First Class Stuart S Stryker, who died in World War II, and Specialist Four Robert F Stryker, who died in the Vietnam War.
In April 2019, the Army decided to add cannon armament to Stryker DVH ICVVA1 vehicles in three brigades; the first is planned to be equipped in 2022