The flag of Alliance of National, Democratic, and Peace Forces for Vietnam, used since 1968 to 1977.
<a href="//commons.wikimedia.org/wiki/User:Namkhanh02" title="User:Namkhanh02">Namkhanh02</a>
based on <a rel="nofollow" class="external free" href="https://flagspot.net/flags/vn-ndpfv.html">http://flagspot.net/flags/vn-ndpfv.html</a>, updated based on <a rel="nofollow" class="external free" href="https://tuyengiao.vn/tutuong/chu-tich-ho-chi-minh-voi-viec-thanh-lap-mat-tran-dan-toc-thong-nhat-25747">https://tuyengiao.vn/tutuong/chu-tich-ho-chi-minh-voi-viec-thanh-lap-mat-tran-dan-toc-thong-nhat-25747</a>