During the French wars, the militia were embodied for a whole generation, and became regiments of full-time professional soldiers (though restricted to service in the British Isles), which the regular army increasingly saw as a prime source of recruits. They served in coast defences, manning garrisons, guarding prisoners of war, and for internal security, such as the time of the Luddite disturbances. The three regiments of Lancashire militia were serving in Ireland during the final Waterloo campaign and were finally disembodied in 1816. Once again, the militia was allowed to decline in the years of the long peace that followed. In 1831 King William IV bestowed on the three Lancashire Militia Regiments the additional title The Duke of Lancaster's Own.