My first attempt at a space battle...whew!
The DS9 relaunch novels where the Borg try to bum-rush the Alpha quadrant in 2381. Klingon Military HQ under Borg attack.
Asteroid stock courtesy Hameed [link]
& ChrisCold [link]
Some of the star fields courtesy Tsarye [link]
Some killer torpedo render stock: [link]
Borg tactical cubes courtesy the Drex Files [link]
Big unfamilar Klingon ships are incomplete renders from MKF on his build thread here: [link]