system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do some large military planes use propellers instead of jet engines?

I though that jet engines are more powerful and more fuel efficient? How come we don't see any smaller military applications using props?
gpt
Jet engines are more fuel efficient at high altitudes and speeds.  Propellers are more fuel efficient at lower altitudes and speeds.  Giant transport aircraft aren't generally going to be flying at high altitude, nor are they designed for supersonic flight.

The high power-to-weight ratio of turboprop engines at low speed allows these planes to take off from land on runways that are much shorter than if they used turbojets, as when you're bring supplies or troops to the front line you probably won't have a long paved runway.