There were/are three artists with this name:

1. Vanguard Party were a Wollongong-based pop/rock band that consisted of musicians from bands such as When the World Sleeps and Lumiere. Their debut album, Forever Jung, was released in 2012. The band were declared "dormant" following the departure of keyboardist Manojlovic and vocalist/guitarist Jared Chappell.

2. Vanguard Party was also a concept Hardcore/Metal band based around the fundamentals of Marxist-Leninist ideas from Arizona, USA. http://www.myspace.com/vanguardpartyaz

3. Vanguard Party is a rock band based in Durham, NC. Their self-titled debut album was released on October 2, 2014. The band includes Alex Jergensen (guitar), Matt Lawless (bass), Derek Rowe (vocals/piano), and Josh Brackett (drums). Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.