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Euphrates River and Tigris River
The Euphrates River has three main shared tributaries: the Sajur the Balikh/Jallab The Khabour
Euphrates River.
The Red Cross operates in 186 countries.
Euphrates River delta
From Thailand it takes about ten minutes to cross the bridge over the Mekong River. From other countries it takes longer.
It took 22 days to cross the river on the Oregon trail.
Incomplete question - does not say which river
Twice
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There are many countries in Mesopotamia. There is Iraq, Iran,Turkey, and Syria.Mesopotamia is the name given to the area of the Tigris-Euphrates river system, along the Tigris and Euphrates rivers, largely corresponding to modern day Iraq, as well as some parts of northeastern Syria, some parts of southeastern Turkey, and some parts of the Khuzestan Province of southwestern Iran.