Shloka 20
अध्याय ५५ — भीष्मस्य प्रचण्डविक्रमः, अर्जुनप्रत्युत्तरं, कृष्णस्य चक्रोद्यतिः
Chapter 55: Bhīṣma’s onslaught, Arjuna’s counter, and Kṛṣṇa’s raised discus
पृष्ठगोपास्तु तस्यथासन् नानादेश्या जनेश्वरा: । केतुमान् वसुदानश्र पुत्र: काश्यस्य चाभिभू:,केतुमान्, वसुदान, काशिराजके पुत्र अभिभू तथा अन्य अनेक देशोंके नरेश सेना पृष्ठके पोषक थे
pṛṣṭhagopās tu tasyathāsan nānādeśyā janeśvarāḥ | ketumān vasudānaś ca putraḥ kāśyasya cābhibhūḥ ||
三阇耶说道：守护其后阵的，是来自诸方的众多国王——计都曼、婆苏陀那，以及迦湿耶之子阿毗部。由是可见，那战阵的后方亦由名闻遐迩的君王镇守，显出军中筹划周密、责任共担，临战而不紊。
(संजय उवाच
Educational Q&A
Even in warfare, responsibility is distributed: the rear is guarded by capable leaders, highlighting discipline, coordination, and accountability within a collective enterprise.
Sanjaya lists the rulers assigned as rear-guards in the army/formation, naming Ketumān, Vasudāna, and Abhibhū (son of Kāśya) among many kings from different regions.