Artillery Forward Observer

How many FO is there in Infrantry Bn?
1. 1
2. 2
3. 3
4. 4
What does FSO stands for?
1. Field Support Officer
2. Fire Support Officer
3. File Supporting Officer
4. Forward Support Officer
How many steps are there in Battle Procedure?
1. 12
2. 15
3. 18
4. 20