Which of the following is a disadvantage of the echelon formation?

Which of the following is a disadvantage of the echelon formation?

• A. Movement is fast
• B. It is extremely difficult to control
• C. It provides no flank protection
• D. It requires minimal coordination

Answer: (B)

In an echelon, units are stepped diagonally behind and to the side of the unit in front, which gives one flank protection and allows a cascading line of fire along the diagonal. The trade-off is that this arrangement makes command and control much more demanding. The leader can’t directly observe or command every element; maintaining the precise diagonal spacing and timing across multiple elements is fragile, especially when moving over uneven terrain, in complex terrain, or under contact. Any speed changes, turns, or obstacles require coordinated adjustments from several units, and delays or miscommunications can create gaps, overlaps, or broken mutual support. That heightened need for coordination and the difficulty of maintaining alignment under stress explain why this is considered a disadvantage. The other options don’t fit as well because the formation is not inherently faster to move, it does provide flank protection (so that benefit exists), and it does not require minimal coordination—quite the opposite.

In an echelon, units are stepped diagonally behind and to the side of the unit in front, which gives one flank protection and allows a cascading line of fire along the diagonal. The trade-off is that this arrangement makes command and control much more demanding. The leader can’t directly observe or command every element; maintaining the precise diagonal spacing and timing across multiple elements is fragile, especially when moving over uneven terrain, in complex terrain, or under contact. Any speed changes, turns, or obstacles require coordinated adjustments from several units, and delays or miscommunications can create gaps, overlaps, or broken mutual support. That heightened need for coordination and the difficulty of maintaining alignment under stress explain why this is considered a disadvantage.

The other options don’t fit as well because the formation is not inherently faster to move, it does provide flank protection (so that benefit exists), and it does not require minimal coordination—quite the opposite.