Daniel 10 likewise shows us that political upheavals in the Terrestrial realm seem to have corresponding conflicts in the Heavenly realm. And tells us Michael fights to defend Israel. See also Ephesians 6.
In the Apocryphal Second Maccabees Chapter 5 we are told that before Antiochus Epiphanes attacked Jerusalem, chariots were seen for 40 days fighting in the heavens above the City. Daniel 8 does seem to also imply heavenly warfare going on at this time. But 2 Maccabees is less reliable then 1 Maccabees, for example I don't know if this was before his first or second sacking of Jerusalem since 2 Maccabees seems to merge the two together. The second one is what resulted in the Abomination of Desolation in Kislev 167 BC. 1 Maccabees 1 and Josephus Antiquities of The Jews Book 15 Chapter 5 makes clear there were two attacks but the first was over 2 years earlier and was relevantly bloodless.
In Wars of The Jews Book 6 Chapter 5 Section 3, Josephus informs us of similar visions seen in the heavens before the War started in 66 AD.
Besides these, a few days after that feast, on the one and twentieth day of the month Artemisius, [Jyar,] a certain prodigious and incredible phenomenon appeared: I suppose the account of it would seem to be a fable, were it not related by those that saw it, and were not the events that followed it of so considerable a nature as to deserve such signals; for, before sun-setting, chariots and troops of soldiers in their armor were seen running about among the clouds, and surrounding of cities.Thing is the events he describes both before and after this I have reasons for suspecting actually happened in 30 AD the year of the Crucifixion/Resurrection and Birth of The Church. Either way important dates in Israel's History. This event alone here Josephus implies to have directly interviewed eye witnesses of, so it's different.
If you look at a Time-Line of Early modern UFO Sightings, and a Time-Line of the development of modern Israel, you'll see a lot of correlations between key milestone events. A third Timeline to consider is the biography of Aleister Crowley.
The decade of the first Zionist Congress was the 1890s, same decade when people were seeing Jules Verne style Airships. 1909 in which Airship sightings occurred in New Zealand was the same year Tel-Aviv, the secular Capital of modern Israel was founded.
1917 was the year the Sun Miracle was performed in Fatima, and of the Balfur Declaration. In occult History that is the year Aleister Crowley performed the Alamantra Working. And in the following year he conjured Lam, the entity that resembled the Greys.
Crowley also performed some key rituals in 1923, same year as the British Mandate for Palestine.
1933 was the year of the Transfer Agreement, and the year of some key UFO sightings also. There were also a lot of interesting UFO occurrences during WWII.
1947 was the year of the Babalon Working, and right after that was Roswell and the other events that are considered the full beginning of the modern UFO craze. 1947-49 also marks the birth of modern Israel.
"Those UFOs weren't seen in Israel" you might object. We're dealing with a conflict that is actually going on beyond our perception, but spilling over into it. At any-rate there have been UFO sightings in Israel, I remember just last year or the year before there was a big buzz about one sighted just over the Temple Mount.
Prophecy in The News had done an episode years ago on correlations between UFO Flaps and Israel's Wars. They didn't cover much of what I laid out above, but did cover stuff about later wars I don't feel like getting into myself.
Nothing anyone predicted happened during the September 2015 Blood Moon. But my brother did catch a UFO taking pictures of it. And moves were made towards dividing Israel during September's UN Meetings.
In the study I did on This Generation Shall Not Pass, I mentioned 120 years as a potential number to use, with one Biblical reason for it being Genesis 6. Now one may object "the context of this is about the Nephilim Activity and The Flood". Well Jesus said "as the days of Noah were" so shall His return be. And many have seen that as among their reasons for connecting the modern UFO Phenomenon with Fallen Angels.
Right now I'm leaning towards, though am by no means predicting, a 2030-2037 End Times model, with a 2033 Rapture. 2037 is 120 years from 1917, and 70 years from the Six Days War. And 2030 would be Two Thousand Years from The Crucifixion.
But remember the Generation is a maximum time limit, not an exact calculation.