Waking in the night is not the problem. Everyone surfaces briefly between sleep cycles, several times, without remembering it. The problem — the part that actually keeps you up — is what happens in the next few seconds: checking the time, doing the math on how many hours are left, and starting to try to fall back asleep, which is itself the thing standing in the way.
The articles in this topic look at that middle stretch of the night specifically: why it clusters at certain hours, what's ordinary physiology versus what's worth mentioning to a doctor, and what changes the pattern — which mostly isn't anything you can do at 3am itself, but the daytime habits that determine how the night behaves.