In which year did Rhodesia issue its Unilateral Declaration of Independence (UDI) from Great Britain?

Player #52878863, you misunderstand the meaning of unilateral declaration which means the country declared it without agreement from UK. India's independence was not unilateral, it was ultimately negotiated (after being fought for).

India gained independence from Britain in 1948,just 17 years before,so America wasn't the last to do so