The victim in Crimea annexation is Budapest Memorandum (1994) that protected Ukrainian territorial integrity in exchange for Ukraine giving up nuclear weapons.
The United States (and other western countries) are concerned that Crimea annexation encourages nuclear weapons proliferation.
Sanctions against Crimea discourage potential annexations and lower chances of nuclear weapons proliferation in the future.
The United States (and other western countries) are concerned that Crimea annexation encourages nuclear weapons proliferation.
Sanctions against Crimea discourage potential annexations and lower chances of nuclear weapons proliferation in the future.
https://en.wikipedia.org/wiki/Budapest_Memorandum_on_Securit...