An easter-egg in Firefly's pilot episode reveals that it takes place in the same universe as the Alien series. It appears the anti-aircraft cannon Mal uses to shoot down an Alliance fighter was manufactured by Weyland-Yutani Corp.
So does this mean Weyland-Yutani provided the Browncoats with weapons to fight the Alliance? Whose side do you think they were on in the Unification War?
Ten years ago this September Firefly premiered on TV. To celebrate, Jeff Halsey made this poster of the Serenity. If you're wondering, the small text says:
"'But it ain't all buttons and charts, little albatross. You know what the first rule of flyin' is? Love. You can know all the math in the 'Verse, but take a boat in the air you don't love, she'll shake you off just as sure as the turning of worlds. Love keeps her in the air when she oughta fall down, tells ya she's hurtin' 'fore she keens. Makes her a home.' – Captain Malcolm Reynolds"