At the outbreak of the Second World War, Lacasse decided to join General de Gaulle’s Resistance by moving to London with the Free French Forces. During the five years of wars Lacasse seemed to have put aside painting while teaching sculpture and ceramics in Stoke-on-Trent. During this period he was totally cut off from his family.
His absence from Paris cost him dearly for the Parisian artistic community had continued without him. In a moment of depression, he destroyed more than a hundred paintings. Having become a French citizen in 1946, Lacasse, encouraged by his wife and friends, went back to painting. Until his death in 1975, Lacasse’s work became the subject of countless exhibitions abroad including UK, Germany and the USA.Wikipedia