During his reign in Aquitaine, Louis was charged with the defence of the Empire's southwestern frontier.

On the southwestern frontier, problems commenced early when c. 812, Louis the Pious crossed the western Pyrenees 'to settle matters' in Pamplona.

After the Indians killed nearly 250-500 at the fort, settlers across the American southwestern frontier were in a panic.

The Spirit also included humorous material, much of it based on experience of settlers near the southwestern frontier.

By 1658 Youlang had been forced back into Yunnan, on the very edge of China's southwestern frontier.

The Podolian Governorate occupied the southwestern frontier of the former Russian empire, bordering Austria-Hungary, and had an area of about 42,000 km2.

It was on the southwestern frontier of the empire and was known as Astrakhan krai.

Its goal was to contain the Soviet Union (USSR) by having a line of strong states along the USSR's southwestern frontier.

Abutting the southwestern frontier of Bosnia, this rugged highland area, Krajina, is regarded as a key to any lasting agreement between Croats and Serbs.

The Ethiopian Air Force responded with punitive strikes across its southwestern frontier against Feerfeer, northeast of Beledweyne and Galkacyo.