White Carniola was inhabited by Slovenes after the 13th century, and even then it was quite remote from other Slovenes on the
Kočevje Rog Plateau to the west and in the
Gorjanci Hills to the north. The immigration of the
Gottschee Germans left the Slovenes even more closely connected to Croatia. However, they still maintained contact with other Slovenes that lived on the other side of the Gorjanci Hills to the north. Differentiation between the North and South White Carniolan dialects occurred in the 15th and 16th centuries, when the Ottomans started attacking
Bosnia and
Dalmatia. Because of this, White Carniolans started moving north of the Gorjanci Hills, and the mostly cleared region of southern White Carniola, especially along the
Kolpa River, was newly inhabited by immigrants from
Serbia,
Bosnia and Herzegovina, and
Croatia. The White Carniolan dialect then formed from a mix of the old White Carniolan dialect,
Serbo-Croatian dialects, and dialects from newly settled Slovenes after the Ottoman invasions. Serbo-Croatian influence was the most prominent in the south, whereas in the north it had negligible influence. Therefore, today the White Carniolan dialect is split based on how much influence it received from Serbo-Croatian. == Accentual changes ==