Or the Battle of Wizna in Poland, 1939.
In which 720 Polish soldiers with only 6 AT guns and few machine guns, fought against a German force of over 42,000 men with over 300 tanks and air support.
The Polish fought till almost the very last men and were then forced to surrender. Out of the original 720, only 40 survived. The Captain even threw him self on a grenade rather than surrender.
However 10 Tanks, multiple other armored vehicles, many aircraft, and over 8000 men were lost by the Germans.
Even though the Polish were defeated, they consider this to be a victory just because of the amazing odds they fought against. It is even referred to as the Polish Thermopylae.