Only the UP or random galactic events as far as i know?
But also quite often the AI can force to be at peace with me..... I don't know how? As far as i know we are at war, then when one of my ships tried to attack all of a sudden out of nowhere i get a warning notice telling me i cannot break some peace treaty so soon?? And i'm like "what freaking peace treaty????? this is the first i heard of it???" Hahahahaha
