ORIGINAL: STIENER - if you voluntarily disband in supply [ in a strat move ] do you lose any troops[?]
Based on my limited testing, depending on the disbanding BG's circumstances you can lose troops or gain troops. When BGs are stacked it appears that, if the frontline BG disbands, all of its troops are lost. However, if the reserve BG disbands when stacked, troops are gained. Troops are also gained by an adjacent BG when a non-stacked BG disbands.
eg. 1/501/101 is stacked in reserve with 501/101. 1/505/101 disbands. As a result, 501/101 gets a net gain of: 2x Platoon HQs, 3x Rifle teams, 1x Sniper, 1x Bazooka, 1x .30 Cal MMG, & 1x .30 Cal LMG. This is in addition to gaining all of the forcepool from 1/501/101.
What's really odd is that neither BG had any .30 Cal LMG teams prior to 501/101 absorbing the disbanded 1/501/101 forcepool. Other disband tests produced different teams (2-man BAR, Ad-hoc Rifle) that neither BG possessed prior to one BG absorbing a disbanded BG's forcepool.