ATP 3-21.9 — Stryker Infantry Rifle Platoon And Squad
ATP 3-21.9 governs techniques for Stryker Infantry rifle platoons and squads conducting offense, defense, and enabling tasks.
- Publication number: ATP 3-21.9
- Title: STRYKER INFANTRY RIFLE PLATOON AND SQUAD
- Date: 06/24/2025
- Proponent: T2COM
- Status: ACTIVE
View ATP 3-21.9 on armypubs.army.mil
ATP 3-21.9 covers organization, missions, capabilities, limitations, leadership, planning, troop leading procedures, orders, rehearsals, and tactical operations. It addresses movement and maneuver, offensive and defensive actions, tactical enabling operations, sustainment, casualty care, maintenance, and fire support, while treating techniques as descriptive rather than prescriptive.
Applies to: ATP 3-21.9 applies to the Active Army, the Army National Guard/the Army National Guard of the United States, and the United States Army Reserve unless otherwise stated.
Topics covered
- Stryker Infantry rifle platoon organization
- Troop leading procedures
- Offensive operations
- Defensive operations
- Tactical enabling operations
- Tactical Combat Casualty Care
- Stryker defensive positions
- Fire support planning
Questions and answers
How does ATP 3-21.9 define risk management?
Risk management is the process to identify, assess, and mitigate risks and make decisions that balance risk cost with mission benefits (JP 3-0). (paragraph 2-23)
What steps does a platoon use to breach an enemy obstacle?
Breach is a tactical mission task in which a unit breaks through or establishes a passage through an enemy obstacle (FM 3-90). (paragraph 3-17)
What is a raid patrol mission in ATP 3-21.9?
A raid is a variation of attack to temporarily seize an objective with a planned withdrawal (FM 3-90). (paragraph 5-201)
What is an ambush?
An ambush is a variation of attack from concealed positions against a moving or temporarily halted enemy (FM 3-90). (paragraph 5-203)
When does a platoon use the wedge formation?
The platoon uses the wedge formation when the enemy situation is unclear or contact is possible, or the enemy situation is unclear. (paragraph 3-46)