Poland had annexed the tiny disputed region of Teschen, where thousands of Poles lived.
a delimited frontier through the disputed region.
Khartoum says it will withdraw its troops from the disputed region of Abyei under certain conditions, but has denied targeting people on an ethnic basis.
The United Nations Security Council has called on the northern Sudanese army to withdraw from positions it has taken in the disputed region of Abyei on the border with southern Sudan.
President Polk ordered General Zachary Taylor to take an army into the disputed region, and in April 1846, one of Taylor's patrols was attacked by Mexican troops.
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