Title: United States Army.
Question: What does OSUT stand for?

Title: Child labour.
Question: When was the United Nations Conventions on the Rights of the Child Act implemented?

Title: Southampton.
Question: Despite not having a good beach, what decade saw  Southampton become popular for sea bathing?

Title: BeiDou Navigation Satellite System.
Question:
What type of satellites does the BeiDou-1 system use?