• Internment of all enemy aliens requested by city.
• Archie Conway, becomes Chilliwack's first casualty of the Second World War, June 25, 1940, H.M.C.S. Fraser.
• Coqualeetza Residential School to become a sanatorium.

1941

• Garages and gas stations implement federal gas rationing.
• Local Japanese-Canadian families pledge their support to Canada after Japanese air attack at Pearl Harbor, Hawaii. Interment follows.
• 1942 Cancelled! Sixteenth annual Cherry Carnival becomes war casualty.
• Pacific Coast Militia Rangers are formed to combat potential invasion.
• Tent City at engineer's camp disappears. Troops move into permanent quarters.

1943

• "Test tube" cows to be raised in Chilliwack as artificial insemination is tried for first time.
• First conscientious objectors at work on local farms.
• Two search and rescue parties near Canadian Pacific Airways crash site on Mount William Knight.
• First Boeing trainees start work at new Catalina aircraft sub-assembly plant.
• 1944 Miracle drug, Penicillin, successfully used here.
• Best on continent, Chilliwack produces two million cans of yellow corn.

1945

• English brides of local men arrive in Chilliwack.
• Chilliwack marks the end of the war with service and parade.
• Engineer Camp becomes a permanent feature in Chilliwack.

1946

• Chilliwack's new civic airport officially opened.
• First Ex-Servicemen move into VLA subdivision homes.
• All Sappers War Memorial unveiled at the Royal Canadian School of Military Engineering.

1947

• Berry growers hail jam rationing end.
• Sharon Mennonite Collegiate Institute opens.

1948

• Chilliwack in grip of flood battle.
• Second World War names added to War Memorial.
• First survey of flood damage reveals two thousand homes flooded.

1949

• Largest neon sign in the Fraser Valley installed at Chilliwack's new Paramount Theatre.
• Farmers favour experimental sprinkler irrigation.
• A house a day is planned as army homes are built on assembly line.
• Displaced persons throng Mennonite Brethren Church.