List of main battle tanks by generation

Columns: Name | Entered service in | Origin | Notes
FV 4201 Chieftain | 1966 | United Kingdom | Armed with the British 120 mm Royal Ordnance L11A5 gun | Vickers MBT | 1967 | United Kingdom | British private venture design for export , licence built as the Vijayanta for India | Stridsvagn 103 | 1968 | Sweden | Turretless design developed and employed solely by Sweden . Double engine feature ; both diesel and gas turbine | Panzer 68 | 1971 | Switzerland | Swiss Main Battle Tank ( MBT ) based on the Panzer 61 | T-72 | 1973 | Soviet Union | Hilmes puts the T-72 in the first intermediate generation | Olifant Mk 1 | 1974 | South Africa | A further development of the Centurion Tank | Type 74 | 1975 | Japan | Hilmes puts the Type 74 in the first intermediate generation

Example questions:
What is the name of the second generation battle tank whose origin consists of four constituent countries ? | What is the name of the second generation battle tank whose origin had its roots in the 1917 October Revolution ? | What is the name of the second generation battle tank whose origin consists of 50 states ? | What is the name of the second generation battle tank whose origin is a unitary parliamentary democracy and constitutional monarchy ?

Answers:
Vickers MBT | T-64 | M60 Patton | FV 4201 Chieftain