Why wasn t Bulgaria a part of Yugoslavia?

Special Discount for your Displate : 1-2 Displates = 30% OFF, 3+ Displates = 37% OFF Get your Displate by accessing my link: http://displate.com/?art=5f7f0f47ee07e Why wasn t Bulgaria a part of Yugoslavia? ♦Consider supporting the Channel: https://www.patreon.com/Knowledgia ♦Please consider to SUBSCRIBE: https://goo.gl/YJNqek ♦Music Used : Kevin MacLeod - Impact Allegretto Kevin MacLeod - Decisions ♦Script & Research : Skylar Gordon #History #Documentary