Well, that all depends on your definition of losing.
Huge Battle Fought (2015-02-04 18:07:21)
Rumours spread of a huge battle in Lesthem:
Ikalak vs. Taselak
Estimated strengths: 1070 men vs. 1440 men
Defender Victory!
Huge Battle Fought (2015-01-16 06:11:15)
Rumours spread of a huge battle in Endelee:
Taselak vs. Ikalak
Estimated strengths: 720 men vs. 630 men
Attacker Victory!
Huge Battle Fought (2015-01-15 18:11:08)
Rumours spread of a huge battle in Taselak:
Ikalak vs. Taselak
Estimated strengths: 1470 men vs. 1020 men
Defender Victory!
Huge Battle Fought (2015-01-05 06:17:08)
Rumours spread of a huge battle in Lesthem:
Taselak vs. Ikalak
Estimated strengths: 1520 men vs. 1220 men
Attacker Victory!
Huge Battle Fought (2014-12-21 18:14:55)
Rumours spread of a huge battle in Seggelin:
Taselak vs. Ikalak
Estimated strengths: 1480 men vs. 500 men
Attacker Victory!
Huge Battle Fought (2014-12-21 06:15:13)
Rumours spread of a huge battle in Seggelin:
Taselak vs. Ikalak
Estimated strengths: 340 men vs. 1290 men
Defender Victory!
Huge Battle Fought (2014-12-07 06:17:29)
Rumours spread of a huge battle in Lesthem:
Taselak vs. Ikalak
Estimated strengths: 1620 men vs. 1350 men
Attacker Victory!
The records don't go further back, but I think we can establish that there is a certain pattern here 
You are ignoring their most excellent strategy though. They don't need to win the battles, so long as their ally comes through for them. What they plan to do if and when that happens though I can't imagine.
