Misc: what country were the incas from?

Questions

15 February 1971 After 1200 years Britain abandons 12-shilling system for ---------- ?

17 February 1971 ---------- regains cricket Ashes with a 2-0 series win ?

19 February 1971 Paul ---------- releases "Another Day" in UK ?

20 February 1971 Major General Idi Amin Dada appoints himself President of ---------- ?

22 February 1971 Lieutenant General Hafiz al-Assad becomes President of ---------- ?