I played through an unpleasantly short Portuegese [sic] campaign today. Normally as the Portugese or other small factions you rush before neighbouring powers can out-produce you too easy. I decided not to for once. Although, I made a second mistake in still attacking too soon. When turtling with 1 province you need a few decades to build up before you do anything, and besides I attacked at a very stupid time. My influence was low, and neither Catille-Léon nor Aragon were at war with the Almohads whom I decided to attack in Algarve. The Elmos quickly countered with a small invasion of Portucal which was easily fended off, while I suffered a defeat towards a relieving force from Cordoba in Algarve (the Elmo units are way overpowered in Early).
Now the Elmos decided to mop me up and invaded Portucale again. A bit demoralized, realising I was finished I auto-calced, lost and was besieged. Just trying to enlengthen (is that a real word?) the siege I sallied, but seemingly forgot to move one unit of MSs out of the castle, as my sally was suddenly interrupted as the Elmo army stormed my castle garrison now only counting 17 men. Of course they won.

Anyway, most of that is beside the point, so you could've just jumped forward to this if I'd told you to: My army dissapeared. As did my king. My sallying troops just dissapeared, but I remained on the map, without kingdom or king. All my emissaries, bishops and princesses were still on the map, and I concluded a ceasefire with the Elmos and married a princess to the king of Castille-Léon! What can cause this or has it even happened to anybody else?