man könnte sinngemäß vielleicht sagen
a.) To keep it short, just a few words about the history of....
oder "In a word, some facts about the history of..."
b) One weekend, the time had come
c) The games were held under (the supervision of) the then leader ODER the leader at that time
hdh? (aber keine garantie für 100% richtige ausdrucksweise!)
stoa