Where was the Polisario Front formally constituted in 1973?

Question

The American film made at the very start of the sound film era, "All Quiet on the Western Front" (1930), on the grimness of warfare in WWI was banned in Germany (after a brief run in 1930) not unexpectedly, but also where?

Answer 1

Mauritania
The Front was formed to dispute Morocco's claims to Saguia el-Hamra and Río de Oro, and aimed to end Moroccan presence in the Western Sahara. The Front is still active and the issue unresolved.