A few more from my files:
The Encyclopaedia Americana – Volume 16 Page 31
“Nebuchadnezzar …destroyed Jerusalem … in 586 B.C.E.”
Light From the Ancient Past – Jack Finnegan – Page 223
“The final destruction of the city (Jerusalem) was in …586 B.C.E.”
The Story of Ancient Nations – W.L. Westerman – Page 69
“Finally, in the year 586 B.C.E. Jerusalem itself was taken.”
Encyclopaedia Britannica – Volume 15 – Pages 383
“On the 7th day of the fifth month 586 B.C.E. Jerusalem was destroyed.”
Yale Oriental Series Researches – Vol. XV
“Jerusalem fell in 586 B.C.E.”
History of the Hebrews – F.K. Saunders
“In July 586 B.C.E…a breach was made in the wall of Jerusalem.”
Unger, Merrill, F., Unger's Bible Dictionary, Moody Press, Chicago, 1966, page 782
"...Nebuchadnezzar promptly invaded his unhappy country and besieged Jerusalem for a year and a half. In 587 Jerusalem fell and numbers of its inhabitants were carried away captive to Babylonia..."
-ithinkisee