John Slidell was sent by James K. Polk
no he was not, he sent somebody to mexico.
To ease the growing tensions over the colonization of Africa
ease tensions with communist China by extending the hand of friendship
ww1 set off the tensions between mexico.
It was a policy that was sought to ease tensions between East and West of Russia.
Arrange a dance
The mason dixen line
President Nixons effort to ease Cold War tensions was known as the Detente.
Glad Hand
Since Mexico banned slavery. See related questions.
The Negotiation of the "gentlemen's Agreement"