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Definition: A battalion is a military unit. The use of the term "battalion" varies by nationality and branch of service.
Context: Canolbwynt yr arddangosfa yw hanes Chwarelwyr Penmaen-mawr a oedd yn rhan o’r ymgyrch ac a oedd yn rhan o fataliwn ‘Pals’ a laniodd yn Suvla Bay. Wrth i’r arddangosfa deithio bydd hefyd yn adrodd hanesion dynion o rannau eraill o Gymru a fu’n ymladd yn Gallipoli.