Misc: Which king of England married Catherine of Valois, and died in 1422?

Questions

knowledgeable folks know that a 'cete' is a group of these carnivores?

in martin luther king jr.'s famous speech, these three words come between 'free at last! free at last!' and 'we are free at last!'?

landing on leyte in 1944, this general proclaimed 'i have returned'?

in 1755, this portuguese capital was devastated by a powerful earthquake?

under the leadership of nasser, this union of egypt and syria was proclaimed on feb 1, 1958?