Narrations state that the horses that trampled Imam Hussein's (as) body were known as Aawajiyya and had distinctive characteristics above other stallions.
A researcher who studied these features for months finally found a book by a German expert on horses known as "The Worlds Strongest Stallions.
It says "There are certain stallions known as Aawajiyya and their speciality is that each stomp of each hoof weighs 65kgs and its purpose is to crush and grind what is beneath it".
Then the Narrator says " I remember one of the riders of Ibn Saads army mention: I heard the ribs of Hussein crack and snap when we crushed him under our horses".
The people who ask why we cry over the son of Fatima(as).
Think about it 10 horses trampled Imam Hussein(as)
Each stomp 65kgs
4 hooves each horse
40stomps x 65kgs = 2600kgs
2600kgs crushed the chest of The son of Fatima Al-Zahraa(as) , one of the 2 masters of the youth of Paradise
This narration is no surprise for Imam Zainul-Abideen(as) mentions: "My fathers chest collapsed in on his back".
When he came to bury him he would pick up one side of his father and the other side would fall apart.
Wa museebatahhhhh Wa Husseinahhhhh
LABAIK YA HUSSAIN A.S.
In Dua e Nasr wal Mahaba we seek refuge from Allah Subhanahu from enemies different arsenal and weapona amongst them is mentioned Awajiya breed of horses
Hafti vol 2 pg 86 line 5