Indigenous language bilingual schooling, introduced in Australia's Northern Territory (NT) in 1973, was a reality for over twenty-five schools at the program's height. Today, the language-of-instruction in these same settings is English only, with only 7 state schools operating bilingual programs. Overt Government hostility began with an attempt to defund Indigenous bilingual education in 1998-99. This paper argues that the discursive techniques used to justify these cuts were crucial to developing key themes in ‘mainstreaming discourses’ in Indigenous politics, which has (...) rehabilitated assimilationist thinking in a neoliberal context through the 2000s and since. Using a discourse-historical method, this paper elucidates how mainstreaming discourses were constructed against bilingual education in the 1998–99 debate, and how they emphasized English-only education geared towards neoliberal assimilation for remote Indigenous communities. Indigenous bilingual education was conceived as part of ‘failed’ self-determination in remote Australia. This paper enhances understanding of the patterns and themes of mainstreaming discourses by tracing their genealogical development in this debate. (shrink)