Bhagavad Gita

ಅನ್ಯೇ ಚ ಬಹವಃ ಶೂರಾ ಮದರ್ಥೇ ತ್ಯಕ್ತಜೀವಿತಾಃ ।
ನಾನಾಶಸ್ತ್ರಪ್ರಹರಣಾಃ ಸರ್ವೇ ಯುದ್ಧವಿಶಾರದಾಃ॥೯॥
anye ca bahavaḥ śūrā madarthe tyaktajīvitāḥ |
nānāśastrapraharaṇāḥ sarve yuddhaviśāradāḥ||9||

Sloka 1:09
Gist of the sloka:
There are many more great warriors; who have come to give up their life for me. They know the use of many kinds of weapons and experienced in many wars.
Showing his lack of confidence in various warriors already present in his own army [Jayadratha, Kritaverma, Shalya etc.,],
Duryodhana makes a general mention but with a tinge of sadness. He claims all of them are experienced warriors but who have come to die and not necessarily to win.
This shows his lack of belief that people who have assembled for him have come with some obligations and not necessarily with commitment to win. It looks like Duryodhana has already assumed that the war is lost, along with his defeat and death of his supporters.
Among those he left out:
Jayadratha was Duryodhana’s brother-in-law.
Shalya was Pandu’s 2nd wife Madri’s brother. He was a powerful warrior but was tricked by Duryodhana to join his forces. Shalya was wanting to support Pandavas all along.
Kritaverma was a Yadava warrior. He had differences with Lord Krishna and joined Kauravas leading the Lord’s army called Narayani. He later collaborated with Ashwatthama in butchering Draupadi’s minor sons.
Shalya and Kritaverma joined with Duryodhana with their own reasons and not for believing in Duryodhana.