The Second Assault Add-on for Battlefield 4 has 5 trophies - 3 bronze and 2 silver.
Kill an enemy flag carrier while carrying their flag in CTF
Find the hidden tunnel in Caspian Border
Ignite a brush fire using the repair tool in Operation Metro or Caspian Border
Kill an enemy with a ceiling collapse in Operation Metro
In a round get 5 kills with air vehicles in Gulf of Oman