Prompt
Which 1658 peace treaty between Sweden and Denmark-Norway resulted in Sweden acquiring Scania (Skåne), Blekinge, and Bohuslän, reaching its greatest territorial extent in Scandinavia?
Expected output
The Treaty of Roskilde in 1658 resulted in Denmark-Norway ceding the historically Danish provinces of Skåne (Scania), Blekinge, Halland (which became permanent), Bohuslän, and Trøndelag (though Trøndelag was returned in 1660) to the Swedish Empire.
| model | score | output |
|---|---|---|
| mistral-large-2512 | 60% | The peace treaty you're referring to is the **Treaty of Roskilde**, signed on **February 26, 1658**, between **Sweden** and **Denmark-Norway**. Under the terms of the treaty, Denmark-Norway ceded the following territories to Sweden: - **Scania (Skåne)** - **Blekinge** - **Halland** (though Sweden had already gained control of it temporarily under the **Treaty of Brömsebro** in 1645) - **Bohuslän** (from Norway) - **Trøndelag** (temporarily, though Sweden later lost it in the **Treaty of Copenhagen** in 1660) This treaty marked **Sweden's greatest territorial extent in Scandinavia**, significantly expanding its control over the southern and western parts of the region. However, Sweden's gains were later reduced in the **Treaty of Copenhagen (1660)**, where it had to return Trøndelag and Bornholm to Denmark-Norway. |
| gpt-5.5-pro | 40% | The **Treaty of Roskilde** (1658) — also called the **Peace of Roskilde** — was the treaty between Sweden and Denmark-Norway that ceded **Scania (Skåne), Blekinge, and Bohuslän** to Sweden. |
| anthropic/claude-opus-5 | — | — |