Skip to main content
Category: Strategies
Type: Competitive Strategy
Origin: Military Doctrine, Hannibal, Battle of Cannae (216 BCE)
Also known as: Flank Attack, Indirect Approach, Envelopment
Quick Answer — Flanking Strategy involves attacking an opponent’s vulnerable side or weakness rather than their strongest position. The approach dates to ancient warfare, famously employed by Hannibal at the Battle of Cannae (216 BCE), where he surrounded a larger Roman army by attacking from the sides. In business, it means targeting competitor blind spots rather than direct confrontation.

​
What is Flanking Strategy?

Flanking Strategy is based on a simple but powerful insight: every opponent has strengths and weaknesses, and their strengths often contain hidden vulnerabilities. Rather than colliding head-on with an enemy’s main force, you move around to attack where they are least prepared, least expecting, or least capable of responding effectively.
“He who fights and runs away, may live to fight another day.” — Ancient military proverb
The core principle is asymmetry. A smaller or weaker opponent can defeat a larger one by avoiding direct confrontation and striking at vulnerabilities. The flank attack forces the enemy to either abandon their defensive position to respond (exposing themselves to other threats) or endure the attack on their weak side.

​
Flanking Strategy in 3 Depths

  • Beginner: In a debate, instead of arguing against your opponent’s strongest point (where they’ve prepared defenses), you pivot to a related but weaker argument they haven’t considered. You “flank” their position by exposing a vulnerability they haven’t protected.
  • Practitioner: In business, a startup avoids competing head-on with an established giant in their core market. Instead, they target a neglected segment, use a different technology platform, or serve an underserved geography—attacking where the giant cannot or will not respond effectively.
  • Advanced: In military theory, flanking connects to the concept of “center of gravity”—the source of an opponent’s strength. By identifying and attacking the supporting elements rather than the main force, you undermine their entire position without directly confronting their strength.

​
Origin

The flanking maneuver is ancient, but its classical formulation came from Carthaginian general Hannibal at the Battle of Cannae in 216 BCE. Facing a Roman army nearly double his size, Hannibal positioned his infantry in a convex formation that slowly gave way under Roman attack—drawing the Roman legions deeper into his lines. As the Romans pressed forward, Hannibal’s elite cavalry attacked from both flanks, encircling the Roman army. The Romans, fully committed to the attack, could not respond to the flanking cavalry. The result was one of the most decisive victories in military history—estimates suggest 50,000-70,000 Roman casualties versus only 6,000 Carthaginian. The principle was formalized in Carl von Clausewitz’s “On War” (1832), which emphasized the power of the oblique attack—concentrating force on one flank while feigning weakness elsewhere. Later, military theorists like B.H. Liddell Hart further developed the “indirect approach,” arguing that direct attacks on enemy strength rarely succeeded compared to maneuvers against weakness.

​
Key Points

1

Identify the Flank

Map the opponent’s complete position: their front (strength), their rear (often vulnerable), their exposed sides, and any areas where their attention or resources are thin.
2

Exploit Weak Points

The flank is not just geographic—it can be temporal (attacking when they’re distracted), perceptual (challenging an assumption they hold), or capability-based (attacking where they lack expertise).
3

Maintain Momentum

Once the flank is engaged, press the attack. A flanking maneuver only works if it creates enough confusion and pressure that the enemy cannot reorganize their defense.
4

Prepare for Counter-Flanking

Experienced opponents will anticipate flanking. Have reserves ready to exploit if they overcommit to protecting their flank, creating a double-envelopment opportunity.

​
Applications

Business Competition

Netflix initially targeted the DVD rental market from Blockbuster by focusing on mail-order convenience rather than physical store locations—a geographic and operational flank. Spotify attacked Apple Music not through better features but through freemium pricing that Apple couldn’t easily match.

Military Operations

Modern applications include pincer movements, outflanking maneuvers, and operational art that seeks to cut supply lines or communications rather than engaging main forces directly.

Personal Competition

In salary negotiations, rather than defending your current salary (where the employer has data), you flank with market rates, your unique contributions, and competing offers—shifting the frame from “defense” to “offense.”

Political Campaigns

Candidates often flank by redefining the issues. Rather than debating on the opponent’s chosen turf, they introduce new dimensions (like character or experience) where they have advantage.

​
Case Study

The Battle of Cannae (216 BCE) stands as the canonical flanking strategy. Carthaginian general Hannibal Barca faced a Roman army of approximately 80,000 troops with only 40,000 Carthaginian soldiers. Rather than accepting a direct battle on Roman terms, Hannibal devised a masterful flanking maneuver. Hannibal deployed his infantry in a convex formation, with his weakest troops in the center and his elite soldiers on the flanks. As the Romans attacked, the center gradually retreated, drawing the Roman legions deeper into the Carthaginian line. Meanwhile, Carthaginian cavalry on both flanks held their position. Once the Romans were fully committed to the attack, Hannibal ordered his elite infantry on both flanks to swing inward, while the Carthaginian cavalry attacked from behind. The Roman army was completely encircled. According to ancient sources, the Romans suffered approximately 50,000-70,000 killed or captured, while Carthaginian casualties were only around 6,000. The battle became required study for military strategists for two millennia. Even today, business schools teach Cannae as a model for competitive strategy—avoiding the competitor’s strength and attacking their vulnerability.

​
Boundaries and Failure Modes

Flanking fails when the opponent detects the maneuver and can respond effectively. If the enemy maintains strong reserves or positions forces to protect all flanks, the opportunity disappears. The Battle of Gettysburg (1863) saw Confederate General Robert E. Lee attempt a flanking maneuver (Pickett’s Charge) against a Union position that was actually stronger than it appeared—the Union had hidden artillery in the woods, turning the flank attack into a disaster. Additionally, flanking requires time and space to execute. Against opponents who can respond instantly or in confined environments, there may be no flank to attack.

​
Common Misconceptions

Correction: While the term originated in military geography, “flanking” in business and competition can mean attacking any vulnerability—technological, temporal, perceptual, or capability-based. The key is attacking where the opponent is weak, not where they are located.
Correction: Historically, flanking is often used by the weaker side. Hannibal at Cannae had roughly half the Roman army’s size. The advantage comes from concentration on weakness, not from numerical superiority.
Correction: While related, flanking focuses on a single vulnerable point for decisive attack, while divide and conquer fragments the enemy into separate pieces. Flanking is a surgical strike; divide and conquer is systematic decomposition.
Flanking Strategy connects to several other strategic frameworks that address how to overcome stronger opponents through indirect means.

Blue Ocean Strategy

Creates uncontested market space. Often involves flanking by entering markets where incumbents cannot or will not compete.

First Mover Advantage

Establishing a position before competitors can respond. Frequently enables flanking by creating lead time to attack vulnerable points.

Divide and Conquer

Breaking an opponent into fragments. Flanking can be one method of creating the divisions that divide and conquer exploits.

​
One-Line Takeaway

Don’t attack where your opponent is strongest—find where they’re weakest and concentrate everything there while they remain fixed on their main position.