[OT] Identify these vehicles (15mm?)

I just picked up the figs in the picture below. I thought I knew what
they
were, but am obviously wrong. Can someone figure where they came from?

http://abacus.sj.ipixmedia.com/abc/M28/1d37525ee4945aa6f747c2c5ef/i-1.JP
G
http://abacus.sj.ipixmedia.com/abc/M28/1d37525ee4945aa6f747c2c5ef/i-1.JP
G

The larger vehicles, tracked, wheeled and 'blowers' all have the same
hull
with different base pieces. They are cruder than I first thought, but
that
was my mis-identifying them in the first place blinding me. ;->=

The_Beast