During the international Post-Napoleonic depression (1815–1821) following the conclusion of the French Revolutionary and Napoleonic Wars (1792–1815), wheat and other grain prices fell by half in Ireland, and alongside continued population growth, landlords converted cropland into rangeland by securing the passage of tenant farmer eviction legislation in 1816, which led, because of the Irish workforce's historic concentration in agriculture, to a greater subdivision of remaining land plots under tillage and increasingly less efficient and less profitable subsistence farms.[2][3]