Military History Club Podcast · Saul David

Jack Bowsher on 'Thunder Run'

·35 min·2 clips

The crossing begins badly, with the South Lancashires underprepared and men shot up in the river.

Saul David opens by welcoming Jack Bauscher to discuss Thunder Run, Mechtila 1945. The episode treats the book as a study of what is described as the greatest combined arms manoeuvre battle of the Second World War. Slim's aim for 1945 is plain. He wants to destroy the Japanese in Burma, and he does not want the monsoon to become a pause that lets the enemy recover. Rather than rest and refit, he keeps striking. After Imphal, the army breaks out of the area up in the Chin Hills and moves down through two valleys into Burma. That advance is not about retaking Burma for territory alone. It is about forcing a decisive military result. The pressure never really lets up. Bauscher explains that the force has been fighting on air supply and guerrilla methods since March 1944, with very little artillery, only a few mortars, and no engineers of its own. The terrain is harsh, and the malaria risk is serious. Even with the Japanese heavily outnumbered, the fighting becomes a slow grind. When the operation starts to bog down, Slim brings in an air assault. He then adds the artillery of the 7th Indian Division to help force the final breakthrough. From there the force breaks out of the Gangaw Valley. It emerges well southwest of Mandalay, at a point the Japanese did not expect, since they assume Mandalay itself will be the main target. That move changes the map. The next obstacle is the Irrawaddy River. The discussion follows the decision to cross at a point between the Japanese 28th Army in the southwest and the 15th Army in the center. That seam matters because it splits two commands. Nyongu is held by an Indian National Army battalion rather than Japanese troops, which turns out to be a lucky break for Slim. Even so, the crossing does not begin neatly. The South Lancashires are brought in at the last minute to lead the assault. Their previous amphibious experience came from Madagascar, which is not much help for a river crossing in Burma. They also had more landing craft there than they do here. The result is an operation that starts under pressure, not certainty. The episode also steps back to consider the pace of adaptation. David presses on how quickly battlefield lessons are being absorbed. He links that speed to the final months in Europe, where learning and adjustment also happen faster than before. The overall effect is a clear account of how momentum, improvisation, and timing can reshape a campaign.

As heard by us

A clear look at Slim's Burma campaign and the hard choices behind the surprise crossing.

Jack Bauscher's discussion of Thunder Run, Mektila 1945 stays close to the ground: why Slim kept pressing the Japanese through the monsoon, and what that choice meant for the fighting in Burma.

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Why you'd press play

You want a map-minded interview on Slim's Burma offensive.

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