Had the most fucking awesome voidwalker ambush ever.
It started with a lizardman vanguard that came from the north. A squad of them with hammers, led by a blowgunner. I order the military to position themselves on the fortress entrance. The lizardman soldiers were bombarded when they killed a flashbang and a putrid zinger that were pastured outside. This caused them to be loosely organized, instead of being in swarms where they could easily overwhelm the first dwarf that engages them. With the potentially threatening formation broken, I order the military to advance on them. Facing a tightly packed wave of steel clad beards, the puking and stunned lizardman advance was...
... cut to pieces, with only two escaping by being too near the edge of the map.
The elven caravan was, at this point, arriving in the east. I order the military back to training. However, two voidwalker ambushes were quickly discovered. The half hearted lizardman attack was (story wise) a diversion! And I had let down my guard!
The first attack appeared at the west, with a steel bound energy bolt that missed a marksdwarf by a square. It's a veteran annihilator leading a squad of lashers. I panic and order all marksdwarves on rampants (not a good idea... But meh it worked out. Just watch).
The marksdwarf fires back, but it predicts the unskilled marksdwarf's aim and dodges them before returning fire. It hits the marksdwarf on the chest, tearing a lung and then ripping off a leg. At this point, however, something amazing happened. The marksdwarf commander has arrived on deck, and fires two bolts in quick succession, one lodging itself on the lower body, the other grazing apart the throat. This fatal shot proves the end of the voidwalker, who quickly bleed to death. Gentleman, behold and fear the world's most precise shooter, who may very well have saved the lives of many of his fellow marksdwarves.:
However, it is at this point where the shit hit the fans. I was content to let the voidwalkers tear apart the elves while I shot at them in safety. However, another ambush was to be found - the emberlight tower! A squad of giant mosquito mounted voidwalker reavers had sneaked up on the caster. Now, since emberlights cannot shoot through fortifications, I have created a tower that is open, but with raisable bridges to stop arrows in case they appear. An emberlight stands there at all times, scouring the surrounding flammable woodlands for passing enemies. The voidwalker had snuck up on him with the mosquito flyer. The emberlight snaps his fingers and invokes Zalkor's inner fire and hits the mosquito, hoping for it to fall upon the ground, taking it's master with it. It did not work, and the voidwalker hacks the emberlight apart before he could set it alight with a fireball. Across the long overhead bridge that leads to the emberlight tower, a master speardwarf notices the butchering and rushes across to help. But halfway across the bridge, and the emberlight is hewn cruelly apart. He stands at the edge of the bridge, watching the mosquito rider fly away...and is crushed as the bridge was finally raised.
I couldn't stand losing two of my best dwarves at once, and immediately save scummed. So sue me. It's been a bad day...