Image: Bhishma in Battle

Bhishma faces Krishna in battle

(image source: Wikipedia)

You can read more about Bhishma at Wikipedia.

Detail:

Krishna wields a chariot wheel (not a "weapon"), while Arjuna attempts to restrain him:

Bhishma:

Image: Arjuna and Bhishma

Image source: Arjuna and Bhishma

Detail:

Image: Bhishma Falls

Image source: Bhishma Falls

Detail: