Booze Grabbag: What the V.O. in Seagrams V.O. stands for??

Questions

In 1875 The game of "snooker" -- a variation of pool -- is invented by Sir Neville Chamberlain, while on duty in ----------?

In 1895 Treaty of ---------- signed, ends first Sino-Japanese War (1894-95).?

In 1961 U.S. backed ---------- invasion in Cuba. Ended in failure.?

In 1970 Apollo 13 limps back safely, ---------- -built oxygen tank no help.?

In 1946 Hayley ---------- (in London, England), actor, born.?