sentences:  The first Jararaca prototype appeared in 1979 and serial production commenced in 1982 after extensive operational testing in Brazil.It was ultimately rejected for large scale service with the Brazilian Army due to concerns over the limited mobility of its four-wheeled chassis but achieved some minor successes on the export market.After the early 1980s, the Jararaca was marketed solely towards potential export customers such as Iraq and Libya, both of which influenced the vehicle's continued development.