Theatre

Does the highlighted "theatre" in this context mean "drama" or "battle"?

Context:

Gigantomachy II (1966) draws from a long tradition of painting conflict – Greek battle friezes, such as the Pergamon altarpiece, Pollaiuolo’s The Battle of the Naked Men, the Gigantomachies of Giulio Romano in the Palazzo del Te, Nicolas Poussin’s The Rape of the Sabine Women, Jacques-Louis David’s painting of the same subject, and the war art of painters such as Géricault and Delacroix. Works in the 1960s on the Vietnam War he entitled the Napalms after the fiery and destructive chemical fuel. Napalm III (1969) is a colour-intensive, emotion-laden narrative on atrocity. Vietnam 111 (1973) includes even more colour but is less classical and contains elements of theatre.