Opera history began: A. With the meetings of the Florentine Camerata
B. When Lully wrote Armide
C. When Rameau published La nuove Musiche
D. With the first preformance of Orfeo ed Euridice by Gluck

A.) With the meetings of the Florentine Camerata

the  seven  days  battles  were  a series of seven battles over seven  days from june 25 to july 1, 1862, near richmond, virginia,  during  the american civil war. the  seven  days ended with mcclellan's army in relative safety next to the james river, having suffered almost 16,000 casualtiesduring  the retreat.