Bandits in the Borderlands

From the introduction:

The party is hired to scout a safe trade route through bandit – infested territory. This adventure includes fourteen encounters, covering a range of play styles, including combat, traps, social interaction, stealth, and problem solving. Almost all of the encounters are optional, allowing the DM to tailor the adventure to the skills of the party and the desired length of the session. The adventure contains no specific references to any setting, and is compatible with any of the official 5e settings.

A two to five hour adventure for four 1st level characters.