There is no widely known conflict referred to as the "Summer War" in 1941 specifically. It's possible that you may be referring to a lesser-known or localized conflict within a specific European country during that time period.
The Summer War took place in 1941 in Finland. It was a conflict between Finland and the Soviet Union during World War II. The war lasted from June to September and resulted in Finland's defeat.
The Summer War was fought in 1941 in Finland. It was a conflict between Finland and the Soviet Union. The war lasted for three months and ended with a Finnish defeat.