Salient (military)

• 1. Introduction

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  A salient bulged 150 kilometers into German-held territory around Kursk. It ran deep enough to draw a Nazi German pincer attack, sparking the largest tank battle in history. Soviet forces held that ground even though enemy lines wrapped around it on nearly every side. Why would defenders let their own front line balloon outward like that, deep into hostile territory? And what turns a bulge in a battlefield map into a trap, or into a weapon aimed at the very army trying to surround it?

• 2. Anatomy of a Salient

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  The enemy line that curls around a bulge has its own name: a re-entrant, an angle pointing inward toward the salient it surrounds. Troops holding the salient face pressure from multiple directions at once, since the enemy occupies ground on several sides of them. That geometry cuts two ways. A deep salient can be pinched off at its base, trapping the forces inside in a pocket that loses its own supply line. But the same salient can also let its defenders break out through the tip. That breakout can strike behind enemy lines, threatening the rear areas of forces stationed outside the bulge. How a defender or attacker creates that shape in the first place decides whether the salient becomes a trap or a springboard.

• 3. Building the Bulge

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  A pincer swinging around the flanks of a strongpoint can turn that position into the tip of a new salient in the defender's own line. Attackers can also produce that shape with a broad frontal assault, one that stalls at the center but keeps advancing along the flanks. That same maneuver can carve a salient into the attacker's own line instead. Only the center pushes through, and that surviving center becomes the salient's tip. A third path relies on trickery. An attacking army can feign a retreat, luring defenders into a chase that ends in a pre-arranged ambush from every side. Not every salient, though, forms on open ground where armies can maneuver freely.

• 4. Trenches and Attrition

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  British troops occupied a large salient at Ypres for most of the First World War. It became so infamous that when infantry simply said 'The Salient,' everyone understood they meant Ypres. That bulge formed after the First Battle of Ypres, and it turned into one of the bloodiest sectors along the Western Front.

  Opposing lines of trenches marked the edges of these salients with unusual precision, since the trenches themselves defined the shape. Most formed the same way, through a broad frontal attack that broke through only at its own center. Digging in also made a pocket difficult to form, since neither army could easily maneuver around static trench lines. That same vulnerability turned salients into magnets for attrition, drawing repeated attacks meant to wear defenders down rather than deliver one decisive breakthrough.

  A similar bulge surrounded the French city of Verdun, and the battle fought there cost both sides heavy casualties.

  Near Fromelles, German forces held a small salient shaped distinctly enough to earn the nickname Sugarloaf. Its small size actually worked in the defenders' favor, letting them fire along, or enfilade, the stretches of no man's land on either flank. The trenches that made pockets so hard to close in this war would give way, a generation later, to a far more mobile way of fighting.

• 5. Mobile War and the Pocket

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  In December 1944, the German Army launched a surprise attack against advancing Allied forces across the Ardennes. That heavily forested region spans mostly Belgium and Luxembourg. That assault carved out a large salient that held for several weeks, an episode now known as the Battle of the Bulge. Contemporaries also called it the Ardennes Offensive or the Von Rundstedt Offensive.

  The German Blitzkrieg showed how mobile warfare could turn salients into pockets far more easily than static trench lines ever could. Each pocket then became the target of an annihilation battle. Calling an encirclement a pocket implies the trapped forces never chose to be surrounded, unlike a fortified position under deliberate siege. Fittingly, that distinction echoes the difference between a chance skirmish and a planned, pitched battle. Decades before Blitzkrieg tactics existed, an entirely different army was already learning that a salient's danger didn't need tanks to prove itself.

• 6. American Civil War Salients

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  On the second day of the Battle of Gettysburg, Union General Daniel Sickles pushed his III Corps out ahead of the Union Army's main line. He acted without orders. That advance nearly cut his corps off entirely once the Confederate Army attacked. Sickles had made a nearly identical move two months earlier, holding a similar exposed position at Catherine's Furnace during the Battle of Chancellorsville. Both times, his corps took heavy losses and needed other units to rescue it.

  At Spotsylvania, the Confederate Army of Northern Virginia reached a strategic crossroads first. There, it dug a timber-reinforced trench line against the larger Union Army of the Potomac. That line curved forward to protect a piece of high ground, a bulge that earned the name Mule Shoe Salient. Union troops massed their attack on that single point and broke through. 22 hours of brutal, hand-to-hand fighting followed before Confederate troops finally pulled back to a new position. The trench lines at Spotsylvania belonged to a war fought with rifles and bayonets. A century later, a very different kind of salient would form along a ceasefire line instead of a battlefield line.

• 7. Beyond the World Wars

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  Turkish forces pushed as far south as the Turkish Cypriot village of Louroujina during the invasion of Cyprus. When a cease-fire line split the island into Greek and Turkish-controlled sectors, it left Louroujina sitting inside a salient. A single road was the only route connecting that village to the rest of Turkish Cypriot-controlled territory.

  The Battle of Boyra pitted the Indian Army and the Mukti Bahini against the Pakistan Army over another salient entirely. Whoever held the Boyra salient controlled the ground overlooking the Jessore Road, an important supply route. Controlling that stretch of the Jessore Road meant controlling how supplies could keep moving through the region long after the fighting at Boyra ended.