Which country fell the fastest in WWII?

Which country fell the fastest in WWII is generally considered to be Denmark, which surrendered in about 6 hours after German invasion on April 9, 1940, making it fastest capitulation in WWII. Germany invaded Denmark at 4:15 AM on April 9, 1940, as part of Operation Weserübung, with German troops crossing border and landing in Copenhagen, Danish military offered brief resistance but government surrendered by 8:34 AM same day, about 6 hours, to avoid destruction of Copenhagen, making Denmark fastest to fall. Other fast falls include Luxembourg, which fell in about 1 day in May 1940, and Netherlands which fell in 5 days in May 1940 after Rotterdam bombing, and Belgium in 18 days, and France in 6 weeks. Poland fell in 35 days in September 1939. So Denmark is fastest, 6 hours, followed by Luxembourg 1 day, Netherlands 5 days. Denmark's quick surrender allowed it to retain some autonomy under German occupation, with Danish government remaining until 1943. So fastest fall in WWII is Denmark, surrendered in 6 hours on April 9, 1940, after minimal resistance, to avoid civilian casualties, making it fastest capitulation, with Luxembourg second at 1 day, Netherlands 5 days.