Here is the full list of all 15 Second Warfare achievements.
The first run of the game
For participating in the first operation Green Berets.
For participation in the operation to destroy the modern pirates in the Gulf of Aden.
For the destruction of drug laboratories.
Military operations in urban environments.
Destruction of chemical weapons.
Specialist 1st Class
Specialist 2nd Class
Specialist 3rd class
Specialist Class 4
Specialist 5 class
Specialist high-end
For successful operation in a mountain cave.
For successful operation in the jungle.
For piloting a helicopter.