This article lists the episodes and short summaries of the 70th to 94th episodes of the Ranma ½ Nettōhen (らんま ⁠1/2⁠ 熱闘編) anime series, known in the English dub as the fifth season of Ranma ½ or "Martial Mayhem".

The first TV series was canceled due to low ratings in September 1989, but was then brought back in December as the much more popular and much longer-running Ranma ½ Nettōhen.

They released them in North America in seven DVD collections they call "seasons".

Nettōhen episodes 70 to 94 (excluding 72) are season 5, which was given the title "Martial Mayhem".

The opening theme song is "Earth Orchestra" (地球オーケストラ, Chikyū Ōkesutora) by Kusu Kusu, while the closing theme is "Red Poppy" (ひなげし, Hinageshi) by Michiyo Nakajima.