The place where Abhimanyu died inside the chakra vyuha is presently known as Abhimanyupur. It is 8 km from Kurukshetra city. It was earlier known as Amin, Abhimanyu Kheda, and Chakramyu.
Upanishads are part of the Vedic corpus. What is generally referred to as the Vedas are the four Veda Samhitas. Samhitas focus on the mantras and procedures related to yajnas. Upanishads focus on the knowledge part of the Vedas.