Sometimes the players post by mistake (or not) a wrong event in a certain Epic Group not matching what we expected to join. To avoid this, you can just take a look on the identify number that always shows in the Epic link, before jump inside.
The following link (coloured in green) to join an Epic Boss is a Sample. The number showed here in bold and red coloured is the number that will allow us to identify the real Epic Boss that will lead the link.
https://apps.facebook.com/war_machine/?page=event&event=123875945&joinEvent=1&source=event1&ref_id=11448265879
1- Hatchling Swarm
2- Tremor Wyrm
3- Chimera
4- Xeno Mothership
5- Shambler
6- Kraken
7- Titan
8- Cataclysm
9- Behemoth
10- Sentinel
11- Asphodel Vanguard
12- Typhon
13- Enclave Assault
14- Gorgon Wyrm
15- Mortifex
16- Lernaean Hydra
17- Black Lithid
18- Arachis
19- Jotun
20- Sentinel Undying
21- Beast of Tartarus
22- Karkinos
23- Gnorax
In the sample, if this were a real event the link could make us join a Hatchling Swarm.
The following link (coloured in green) to join an Epic Boss is a Sample. The number showed here in bold and red coloured is the number that will allow us to identify the real Epic Boss that will lead the link.
https://apps.facebook.com/war_machine/?page=event&event=123875945&joinEvent=1&source=event1&ref_id=11448265879
1- Hatchling Swarm
2- Tremor Wyrm
3- Chimera
4- Xeno Mothership
5- Shambler
6- Kraken
7- Titan
8- Cataclysm
9- Behemoth
10- Sentinel
11- Asphodel Vanguard
12- Typhon
13- Enclave Assault
14- Gorgon Wyrm
15- Mortifex
16- Lernaean Hydra
17- Black Lithid
18- Arachis
19- Jotun
20- Sentinel Undying
21- Beast of Tartarus
22- Karkinos
23- Gnorax
In the sample, if this were a real event the link could make us join a Hatchling Swarm.