- World War II (Nick Fury)
- Science fiction (Machine Man and Rom, Spaceknight)
- Secret agents (Shang-Chi)
- Western (Rawhide Kid)
- Fantasy (Kull)
There was also one non-Marvel strip, the historical Wulf the Briton by Ron Embleton, previously published in Polystyle's TV Express. Later additions included The Golem and War is Hell, and the title also carried the original fourteen-part humour strip I Was Adolf's Double by Tim Quinn and Dicky Howett.
Forces in Combat lasted for 37 issues before being merged with the SF weekly Future Tense (with #13). Rom was the only strip carried over and the Forces in Combat subtitle was dropped a week later.