geography: What are the worlds four oceans - alphabetically?

Questions

In 1937 USSR executes ------- army leaders as Stalin's purge continued?

In 1964 ---------- begins a long jail term in South Africa. ?

In 1986 P. W. ---------- declares South African national emergency. ?

In 323 B.C. ---------- the Great dies of fever at Babylon?

In 323 B.C. Alexander the Great dies of ---------- at Babylon?