You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "what does a sfc do in the army?" whose answer is tactical casualty evacuations.
Each document should contain about 30 words, and these documents should contain useful information.

Query: SFC in the army
Useful Output:

Doc 1: It is my understanding the TIG requirement is 48 months as a SSG before you can become promotable and then receive a sequence number on the OML.
Doc 2: SFCs occupy a unique position within the enlisted ranks. They are senior non-commissioned officers with significant authority and responsibilities.
Doc 3: Since your grade is determined by virtue of office or position, calling them First Sergeant is probably correct.
Doc 4: I would say I joined because I had always wanted to be a Soldier and that was the easiest way for me to get out of my hometown and experience some of the world.
Doc 5: Sergeant First Class (SFC) Amran S. Moore is from Waukena, California. He entered the Army in 2002 and attended Basic Combat Training and Advanced