The Last War (1961)

None.

A submarine is captured by net.

There are references to a new Korean War that has started, but is quickly stopped.

Several war vehicles shoot at each other, and many get blown up. Some outburnt corpses are seen in the aftermath.

Multiple jet planes shoot at each other. Some crash land into water, while others explode.

A woman falls dead after she barely got out of a panicking crowd of people.

Mild language.

Several people smoke cigarettes throughout.

A man is drunk, after he's been consuming sake.

In one scene, an English-speaking man can be seen smoking his pipe.

The tensions between the Federation (US) and the Alliance (USSR) becomes stronger, leading to a Thrid World War. The theme itself with the WWIII could be emotionally intense or disturbing for some people.