The situation is sufficiently serious for the…

The situation is sufficiently serious for the King to assemble another punitive expedition.

Henry IV's forces, this time attacking through central Wales, drive from Shrewsbury and Hereford Castle through Powys toward the Strata Florida Abbey, a Cistercian house known to be sympathetic towards Owain.

Henry intends to remind the monks of their loyalties and prevent the revolt from spreading any further south.

After terrible weather and constant harassment by the Plant Owain he reaches Strata Florida in no mood to be merciful.

His army after a two-day drinking session partially destroys the abbey and executes monks suspected of pro-Owain loyalties.

Henry fails, however, to engage Owain's forces in any large numbers.

Plant Owain harasses him and engages in hit-and-run tactics on his supply chain but refuses to fight in the open.

Henry's army is forced to retreat.

As he does so the weather turns, and his army is nearly washed away in floods.

Henry, sleeping in his armor, almost dies when his tent is blown down.

Wet, starving, and dejected, they return to Hereford Castle with nothing to claim for their efforts.