# Infantry Rifle Company May 2018

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## Headquarters, Department Of The Army



## Infantry Rifle Company Contents

PREFACE........ ix
INTRODUCTION ........ xi
Chapter 1
ORGANIZATION ........ 1-1
Section I - Operational Overview ........ 1-1 Operational Environment ........ 1-1 Decisive Action ........ 1-4 Combat Power ........ 1-4 Combined Arms ........ 1-6 Hasty Versus Deliberate Operations ........ 1-7 Close Combat ........ 1-7 Operations Structure ........ 1-8 Key Doctrinal Terms and Definitions ........ 1-13 Section II - The Infantry Rifle Company ........ 1-13 Mission ........ 1-13 Capabilities ........ 1-14 Limitations ........ 1-14 Organization of the Infantry Rifle Company ........ 1-14 Duties and Responsibilities ........ 1-16
Chapter 2
OFFENSE ........ 2-1
Section I - Doctrinal Basis for the Offense ........ 2-1 Offensive Tasks ........ 2-1
Forms of Maneuver ........ 2-2 Combat Formations ........ 2-11 Movement Techniques ........ 2-16 Troop Movement ........ 2-20 Reconnaissance and Surveillance ........ 2-23 Security Operations ........ 2-23 Key Doctrinal Terms and Definitions ........ 2-24 Section II - Movement to Contact ........ 2-25 Conduct a Tactical Road March ........ 2-25 Occupy an Assembly Area ........ 2-40 Passage of Lines, Linkup, and Battle Handover ........ 2-45 Doctrinal Basis for a Movement to Contact ........ 2-61 Illustration of a Movement to Contact ........ 2-75 Approach March ........ 2-81

*This publication supersedes FM 3-21.10, The Infantry Rifle Company, 27 July 2006.

Figure 2-39. Approach march (advance in company columns), example ........ 2-88 Figure 2-40. Cordon and search (inner and outer cordon) ........ 2-93 Figure 2-41. Cordon and search (target area) ........ 2-95
Figure 2-42. Graphic operating system ........ 2-100
Figure 2-43. Grid reference graphic ........ 2-101 Figure 2-44. Search and attack (company areas of operation) ........ 2-109 Figure 2-45. Search and attack (method with scout platoon forward) ........ 2-111 Figure 2-46. Company conducting a search and attack (dispersed platoon method) ........ 2-112 Figure 2-47. Search and attack (unit massing to attack) ........ 2-114 Figure 2-48. Approach to objective ........ 2-125 Figure 2-49. Isolate the objective ........ 2-128 Figure 2-50. Establish breach and secure a foothold........ 2-130
Figure 2-51. Exploitation of the penetration ........ 2-131 Figure 2-52. Planning options (attack against a moving enemy) ........ 2-133 Figure 2-53. Flank attack against a moving enemy ........ 2-135 Figure 2-54. Company terrain-oriented attack ........ 2-140 Figure 2-55. IBCT attack (scheme of maneuver), example ........ 2-149 Figure 2-56. Battalion attack (axes of advance), example ........ 2-151 Figure 2-57. Battalion attack (support by fire), example ........ 2-153 Figure 2-58. Company attack (support by fire), example ........ 2-155 Figure 2-59. Company attack (breach), example ........ 2-157 Figure 2-60. Company attack (assault), example ........ 2-159 Figure 2-61. Follow through (mission continuation), example ........ 2-160 Figure 2-62. Linear ambush ........ 2-165 Figure 2-63. L-shaped ambush ........ 2-166 Figure 2-64. Area ambush (central and outlying ambushes) ........ 2-167 Figure 2-65. Anti-armor ambush (using separate search team) ........ 2-168 Figure 2-66. Company anti-armor ambush (infiltration and occupation), example ........ 2-173
Figure 2-67. Company anti-armor ambush (employment and actions in kill zone), example .... 2-175 Figure 2-68. Company raid (insertion/infiltration), example ........ 2-183 Figure 2-69. Company raid (objective area sealed off/isolation), example ........ 2-184 Figure 2-70. Company raid (objective seized and task accomplished/withdrawal), example .... 2-185 Figure 3-1. Defense of a linear obstacle (mutual support between rifle platoons) ........ 3-3 Figure 3-2. Perimeter defense (platoons positioned forward) ........ 3-5 Figure 3-3. Perimeter defense (squads positioned in-depth) ........ 3-7 Figure 3-4. Y-shaped perimeter defense (primary and alternate engagement areas) ........ 3-8 Figure 3-5. Modified Y-shaped perimeter defense (primary and alternate engagement areas) .... 3-9 Figure 3-6. Perimeter defense (engagement area control measures) ........ 3-10 Figure 3-7. Company reverse slope defense (slope terminology) ........ 3-12 Figure 3-8. Company reverse slope defense (oblique defilade) ........ 3-14 Figure 3-9. Battalion relief in place (companies occupy same positions) ........ 3-22

## Contents

Figure 3-10. Company battle position as part of the battalion defense (disposition of forces) .... 3-33 Figure 3-11. Primary, alternate, supplementary, and subsequent battle positions ........ 3-35 Figure 3-12. Identify likely enemy avenues of approach, example ........ 3-38
Figure 3-13. Engagement area (motorized Infantry and armor threat), example ........ 3-41
Figure 3-14. Key terrain and avenues of approach, example ........ 3-46 Figure 3-15. Company and platoon employment, example ........ 3-48 Figure 3-16. Tactical obstacle effects ........ 3-52 Figure 3-17. Protective, tactical, and supplementary wire obstacles ........ 3-54 Figure 3-18. Mobile actions focused on the enemy ........ 3-67 Figure 3-19. Battalion area defense (defense in depth), example ........ 3-73 Figure 3-20. Company area defense (Company B defense in depth), example ........ 3-75 Figure 3-21. Battalion area defenses (security area engagement), example ........ 3-77
Figure 3-22. Battalion area defense (battle handover), example ........ 3-79 Figure 3-23. Battalion area defense (engagement within the main battle area), example ........ 3-81 Figure 3-24. Company B area defense (extend actions in depth), example ........ 3-82 Figure 3-25. Battalion area defense (extend actions in depth), example ........ 3-84 Figure 3-26. Battalion area defense (commitment of the reserve), example ........ 3-86 Figure 3-27. Delay from alternate positions ........ 3-96 Figure 3-28. Delay from subsequent positions ........ 3-97 Figure 3-29. Delay within an area of operation ........ 3-103 Figure 3-30. Delay forward of a terrain feature for a specified time ........ 3-104 Figure 3-31. Detachment left in contact (multiple sub-elements left in place) ........ 3-108 Figure 3-32. Detachment left in contact (one task-organized unit left in place) ........ 3-109 Figure 4-1. Mechanism for interagency tactical integration ........ 4-7
Figure 4-2. IBCT area security operation (nonlinear and noncontiguous areas of operation),
example ........ 4-34
Figure 4-3. Company area security operation (mounted march and linkup), example ........ 4-39 Figure 4-4. Company area security operation (actions Release Point1), example ........ 4-40 Figure 4-5. Company area security operation (actions Release Point 2), example ........ 4-41
Figure 4-6. Company area security operation (follow-on mission), example ........ 4-42
Figure 4-7. Battalion area security operation (nonlinear and contiguous areas of operation),
example ........ 4-43
Figure 4-8. Company area security operation (cordon and knock), example ........ 4-46 Figure 4-9. Company area security operation (cordon and kick), example ........ 4-47 Figure 4-10. Company area security operation (Combat Outpost 1), example ........ 4-48 Figure 4-11. Security force assistance in the conflict continuum ........ 4-50 Figure 4-12. Battalion and company support to security force assistance, example ........ 4-59 Figure B-1. Parallel planning ........ B-2 Figure B-2. Troop-leading procedures correlated with risk management steps ........ B-4 Figure B-3. Troop-leading procedures outline ........ B-5 Figure B-4. Example warning order format ........ B-7 Figure B-5. Box war gaming technique ........ B-28
Figure B-6. Belt war gaming technique ........B-29 Figure B-7. Avenue in-depth war gaming technique ........B-30 Figure B-8. Operations order format ........B-33
Figure C-1. Identifying probable enemy locations and scheme of maneuver, example ........ C-5
Figure C-2. Determining where and how to mass fires, example ........ C-6 Figure C-3. Orienting forces to speed target acquisition, example ........ C-7 Figure C-4. Common fire control measures ........ C-8 Figure C-5. Constructed target reference point markers, examples ........ C-10 Figure C-6. Terrain-based quadrants, example ........ C-12 Figure C-7. Friendly-based quadrants, example ........ C-13 Figure C-8. Fire pattern, examples........ C-18 Figure C-9. Target array, example ........ C-19
Figure D-1. Final protective line integration of fires and obstacles ........ D-9 Figure D-2. Fire support execution matrix for a company combined arms breach, example ..... D-16 Figure D-3. Fire support execution matrix for company deliberate attack, example ........ D-17 Figure D-4. Beginning of close air support ........ D-36 Figure D-5. Execution of 105-mm shaping fires; shifting of close air support ........ D-37 Figure D-6. Beginning of 120-mm and supporting fires; shifting of 105-mm fires ........ D-38 Figure D-7. Beginning of 60-mm fires; shifting of 120-mm fires ........ D-39 Figure D-8. Cessation of 60-mm fires; shifting of supporting fires ........ D-40 Figure E-1. Infantry weapons squad ........ E-2 Figure E-2. Assault platoon organization and equipment ........ E-3 Figure E-3. Javelin and TOW employment as part of a combined arms team ........ E-6 Figure F-1. Abrams tank danger zone ........ F-4 Figure F-2. Mobile gun system danger zone ........ F-5 Figure F-3. Bradley fighting vehicle danger zone ........ F-6 Figure F-4. Bradley fighting vehicle TOW backblast danger zone ........ F-7 Figure F-5. MRAP vehicle loading of one Infantry rifle platoon, example ........ F-13
Figure F-6. Attacks along converging routes ........ F-15 Figure F-7. Mounted forces support by fire ........ F-16 Figure F-8. Mounted forces integrated throughout position ........ F-18 Figure F-9. Mounted force positioned as a counterattack force ........ F-19 Figure F-10. Hasty checkpoints ........ F-21 Figure G-1. Breach area ........ G-4 Figure G-2. Breach organization course of action, example ........ G-9 Figure H-1. Chemical, biological, radiological, and nuclear passive defense architecture ........ H-4 Figure I-1. Service station method ........ I-10 Figure I-2. Tailgate resupply method ........ I-11 Figure I-3. Battalion and company concept of support, example ........ I-17

## Tables

Table 2-1. Comparison of combat formations........ 2-15 Table 2-2. Sample variances of cordon and search methods ........ 2-97 Table 3-1. Comparison of two delay techniques ........ 3-94 Table 4-1. Phases of the stability framework and stability transition phases ........ 4-11 Table B-1. Recommended enemy situation template items ........ B-20 Table B-2. Precombat checks and precombat inspection checklist, example ........ B-38 Table C-1. Common fire control measures ........ C-9 Table C-2. Weapons safety posture levels ........ C-15 Table D-1. Field artillery and mortar final protective fire planning data ........ D-8 Table D-2. Artillery response times ........ D-11
Table D-3. Internal format for the scheme of fires subparagraph, example ........ D-13 Table D-4. Company TTLODACcompleted worksheet for fire support tasks, example ........ D-14 Table D-5. Advantages and disadvantages of conventional indirect fire ........ D-22 Table D-6. Advantages and disadvantages of direct alignment ........ D-22 Table D-7. Advantages and disadvantages of direct lay ........ D-23 Table D-8. Advantages and disadvantages of hip shoot ........ D-23 Table D-9. Artillery and mortar call for fire ........ D-26 Table D-10. Army attack aviation call for fire format ........ D-28 Table D-11. Game plan and 9-line close air support brief ........ D-33 Table G-1. Breaching organization and responsibilities ........ G-7 Table G-2. Breaching considerations within troop leading procedures ........ G-10 Table H-1. Characteristics of chemical agents ........ H-3 Table H-2. Mission oriented protective posture levels ........ H-5
ID card/ID tags
T&E mechanisms
Canteens/MOLLE hydration bladder
Grappling hook
Spare barrels
Ammunition/magazines
Sling sets
Spare barrel bags
Individual weapons
Pick-up zone marking kit
Extraction tools
Protective mask
Radio's
Asbestos gloves
GPS/Laser range finder
Barrel changing handles
All clothing items in packing list
Handheld microphones
Flashlights
Night vision devices
Headspace and timing gauges
Batteries and spare batteries
VS-17 panel
Radios and backup communications
Improved outer tactical vest
Vehicle tools (if applicable)
Call for fire procedures
Binoculars
MOLLE ruck/assault pack systems
9-line medical evacuation procedures
Earplugs
Knee and elbow pads
Weapons cleaning kit
Night vision goggles mounting plate
Ballistic spectacles
Meals and food
Poncho
Insect repellent
Flexi cuffs
Infrared strobe
Improved rain suit top and bottom
Advanced combat helmet
Visual/language translator card
Litter
Chemical lights
Water purification tablets
Protractor/map
Combat boots
Watch
Bayonet and scabbard
Entrenching tool
Lip balm and sunscreen
Lensatic compass
Weapon tie downs
Concertina wire gloves
Notebook/pen/pencil
Combat lifesaver bags
Tripods
Equipment packed according to SOP
Pocket mirror
Pintles
Camouflage stick
Counterradio electronic warfare device
STEPS TO
BREACH PLANNING CONSIDERATIONS
TROOP
LEADING
PROCEDURES
*Step 2 - Issue a Warning
Understand the mission, commander's intent, and scheme of movement and maneuver (two levels up). Complete the following as part of the initial intelligence preparation of the battlefield
Develop terrain products (mobility corridor and combined obstacle overlay). Evaluate the effects of terrain and weather on friendly mobility and enemy countermobility and survivability
capabilities. Assess enemy countermobility capabilities (manpower, equipment, and materials), and template enemy obstacles based on threat patterns, terrain, and time available.
Step 3 - Make a Tentative Plan
Mission Analysis
Identify specified and implied mobility (breaching) tasks and determine any obvious shortfalls in breaching assets engineer forces and special equipment and initiate requests for augmentation as early as possible. Develop information requirements related to breaching (terrain restrictions and mobility restraints, necessary or desired obstacle information, enemy countermobility and survivability capabilities), and recommend draft requirements as possible commander's critical information requirements. Integrate information collection tasks and engineer or other necessary specialized reconnaissance capabilities into the information collection plan.
COA Development
Identify the need to conduct a breach for each course of action based on mobility corridors and template enemy obstacles.
Allocate reduction assets (engineer units and breaching
equipment) based on the results of reverse planning. Develop tasks that implement the breaching fundamentals suppress, obscure, secure, reduce, and assault. Determine breach organization requirements (support, breach, assault force) and ensure that arrayed forces have been adequately resourced.
STEPS TO
BREACH PLANNING CONSIDERATIONS
TROOP
LEADING
PROCEDURES
War game the breach organization
Force ratios against variances in the enemy disposition. Array of breach assets based on losses or variances in the composition of obstacles.
COA Analysis
War-game changes in the planned point of breach, locations of support by fire positions, and wind effects on obscuration. War game friendly reactions to enemy counterattacks within the breach area and enemy use of scatterable mines to isolate forces and repair breached obstacles.
Refine the plan based on results of war gaming.
Analyze and evaluate the advantages and disadvantages for each course of action in relation to the ability to execute the
breaching:
Step 3 - Make a Tentative Plan (continued)
Ability (time-distance) to shift breaching assets between units beyond the line of departure.
COA Comparison
Ability to reinforce the breaching forces or respond to enemy counterattacks within the breach area (use of a reserve).
Gain approval for any changes to the essential tasks for mobility. Gain approval for recommended priorities of effort and support.
COA Selection
Gain approval for requests for engineer augmentation to be sent to higher headquarters.
*Step 4 - Initiate Movement *Step 5 - Conduct Reconnaissance *Step 6 - Complete the Plan
Ensure that the task organization of engineer forces and critical breach equipment is accurate and clear, to include the necessary instructions for effecting linkup (linkup should be as early as possible in the planning process).
Step 7 - Issue the Order
Ensure the quality and completeness of subunit instructions for performing
breaching.
*Step 8 - Supervise and Refine *See appendix B

## Index  A

nonlinear and noncontiguous illustration. 4-145
operational overview. 4-59 planning. 4-68 preparation. 4-125 protection. 4-108
areas of operation. 1-47
close. 1-53 consolidation. 1-55 deep. 1-52 support. 1-54
armorer. I-8 Army attack aviation. D-109
close air support. D-121
Army Health System. I-57 assembly area. 2-572, 2-145 assembly area illustration. 2-
161
attack ambush. 2-613 illustration. 2-595 mounted force support by fire. F-57
on converging routes. F-55 on same route. F-56 planning and preparation. 2-
623
raid. 2-680 retrograde. F-65 sequence of events. 2-571
attacking deeper. 3-47
administrative movement. 2-39 advance guard. 2-232 approach march. 2-293
actions on contact. 2-298 combined arms organizations. 2-295
illustration. 2-300
area defense area of operation. 3-120 Army aviation support. 3-
171
battle positions. 3-129 civil considerations. 3-196 countermobility planning. 3-
175
engagement areas. 3-140 establish security. 3-255 forward defense. 3-165 illustration. 3-269 leader reconnaissance. 3-
253
main battle area engagement. 3-265
mobility. 3-192 movement and maneuver.

3-118
obstacle control measures.

3-185
obstacle intent. 3-182 occupation. 3-258 planning. 3-107 posiition selection. 3-124 preparation, 3-56 security area engagements.

3-261
terrain reinforcement. 3-175 wire obstacles. 3-191
area of operation defense. 3-120
area security execution. 4-143 fires. 4-102 intelligence. 4-92 movement and maneuver.

4-81
nonlinear and contiguous illustration. 4-165
battalion echelon. I-79 battle handover. 3-231, 2-193 Bradley fighting vehicle. F-7 breach area. G-12 covert, G-2 deliberate. G-7 fundamentals. G-17 hasty. G-8 mass combat power. G-31 organization. G-23 synchronization. G-32
breakout. 3-43
exfiltrate. 3-46

## C B

casualty operations. I-53 CBRN environment. H-4
biological. H-9 chemical. H-6 contamination mitigation. H-
19
nuclear. H-11 passive defense. H-14 protection. H-16 radiological. H-10
checkpoints. 2-103 combat formations. 2-21
column. 2-24 echelon. 2-28 line. 2-25 selecting. 2-29 vee. 2-27 wedge. 2-26
combat medic. I-9, 1-93 company command post. A-1
intelligence support team.

A-12
primary and alternate. A-4 resourcing. A-7
company commander. 1-79 company trains. I-80 control methods. 2-53 cordon. 2-367
actions on the objective. 2-
376
retrograde. 2-383
cordon and search. 2-305
command element. 2-319 cordon. 2-367 principles. 2-307 search element. 2-327 security element. 2-321 six phases. 2-339 support element. 2-335 task organization. 2-317
counterattack. 2-672 counterreconnaissance forces.

3-234
cover and concealment. E-16

## D

task. D-9
fire support team. 1-91 fires. 3-201 first, 1-2, 1-16, 2-11, 2-17, 2-
36, 2-41, 2-61, 2-72, 2-82, 2- 112, 2-128, 4-42, D-2
first sergeant. I-5 flank and rear security. 2-249 flank engagement. E-13 force-oriented attack moving enemy. 2-505 stationary enemy. 2-427
foreign security force development tasks assess. 4-271 battalion and company assistance. 4-273
short-, mid-, and long-term success. 4-276
forms of maneuver. 2-5
envelopment. 2-6 flank attack. 2-20 frontal attack. 2-10 infiltration. 2-15 penetration. 2-11 turning movement. 2-8
forward observers. 1-92 forward passage of lines. 2-175

decisive, shaping, and
sustaining operations. 1-57
integration. 1-63 maintaining continuity. 1-65 position of relative
advantage. 1-61
defense
breakout. 3-43 characteristics. 3-3 denial operations. 3-40 of a linear obstacle. 3-6 perimeter. 3-14 reverse slope. 3-30 when encircled. 3-41
delay. 3-314
execution. 3-357 organization of forces. 3-
315
planning. 3-320 preparation. 3-352
demonstrations and feints. 2-
674
direct fire planning and control
control. C-10 planning. C-10 principles, C-1
discarding sabot. F-18

## G E

ground movement hazards. F-
20

## H

hasty checkpoint mission. F-73 human resources support. I-50

echelonment of fires. D-132
concept. D-133 example. D-139 preparation. D-137
execution. 2-270 executive officer. I-4, 1-81

## I F

Infantry weapons squads. E-2
assault platoons. E-3
intelligence. 3-197

## K

key doctrinal terms. 3-92, 2-64,
1-69

## L

limited visibility attack. 2-547 linkup. 3-81, 2-183 LOGPAC technique. I-42
M
main, 3-24, A-1, B-1, C-1, D-1, E-1, F-1, G-1, H-1, I-1
main battle area engagement.

3-239
main body. 2-253, 2-79
final coordination line. 2-334 fire support close support. D-68 commander's guidance. D-7 execution matrix. D-60 final protective fire. D-24 obscuration. D-74 organization. D-96 plan. D-6 planning. D-17 preparation. D-47 role of company commander and FSO. D- 11
scheme of fires. D-104, D-
49
system. D-2 tactical and technical triggers. D-40
target refinement. D-36
maintenance. I-29 march column. 2-81
control measures. 2-99 dismounted. 2-88 mounted. 2-91 planning. 2-82 security. 2-84
march execution. 2-124 march preparation. 2-121 mass and depth. E-17 mortar section sergeant. 1-88 mounted platforms. F-50 movement techniques. 2-31
alternative bounds. 2-36 bounding overwatch. 2-34 successive bounds. 2-37 travelling. 2-32 travelling overwatch. 2-33
movement to contact. 2-218
coduct the operation. 2-225 cordon and search. 2-204 illustration. 2-280 organization. 2-221 search and attack. 2-386
MRAP vehicles. F-37

## O

offensive tasks, 2-1
characteristics. 2-3
operational environment desert terrain. 1-13 jungle terrain. 1-14 mountainous terrain. 1-12 subsurface area. 1-15 threats and hazards. 1-6 urban terrain. 1-11
operations process. 1-44
main and supporting efforts.

1-67
P
passage of lines. 2-169
forward. 2-175 line of departure. 2-576 planning. 2-170 rearward. 2-179 rehearsal. 2-174
patrols in urban terrain. F-71 planning. 2-256 platoon leader. 1-83 platoon sergeant. 1-84 precombat checks and inspections. B-170
preparation. 2-267 protection. 3-205

## Q

quartering party. 2-150, 2-77

## R

radiotelephone operator. 1-86 raid. 2-680
illustration. 2-706
rearward passage of lines. 3-
231, 2-179
reconnaissance and surveillance. 2-573, 2-227
CBRN. H-27
reconnaissance element. 2-76 rehearsals techniques. B-162 types. B-157
relief in place. 3-51
execution. 3-75 planning. 3-57 preparation. 3-70
resupply operations. I-35 retirement. 3-410
tactical movement. 2-40
fundamentals. 2-41
tactical road march illustration.

2-126
march units. 2-142 quartering party. 2-131 reconnaissance. 2-128
tanks. F-2
crew and passenger positions. F-29
external stowage. F-32 firepower and observation capabilities. F-27
Infantry mounted on top. F-
67
maintenance. F-34
ten supply classes. I-13 terrain-oriented attack. 2-539 TOW missile system. F-22 traffic control. 2-106 trail party. 280 troop leading procedures steps.

## V Vehicle Recovery. F-82

secure and stabilize the operational environment. 4-8
signal support NCO. I-7 spoiling attack. 2-721 stability considerations for transitions. 4-44
establish, maintain, or reestablish. 4-21
interorganizational collaboration. 4-4
military and civilian organizational cultures. 4-6
standoff. E-14 stay-behind operations. 3-48 Stryker family of vehicles. F-12 supply sergeant. I-6, 1-85 supporting service and joint operations. 4-182
example training scenario.

4-257
execution. 4-238 planning. 4-209, 4-190
sustainment. 3-203

## W

S
search and attack. 2-386
execution. 2-400 organization of forces. 2-
387
planning and preparation. 2-
391
second, 2-22, 2-40, 2-45 security. 2-107
withdrawal execution. 3-404 organization of forces. 3-
376
planning. 3-380 preparation, 3-105
T
tactical march techniques. 2-69
close column. 2-71 extended. 2-73 infiltration. 2-72 open column. 2-70 organization. 2-74
By Order of the Secretary of the Army:
Chief of Staff Official:
Administrative Assistant to the Secretary of the Army
1812090
DISTRIBUTION:
Active Army, Army National Guard, and United States Army Reserve: To be distributed in accordance with the initial distrubution number (IDN) 116082, requirements for ATP 3-21.10.