I've got some random ideas :
"Scuttler" (decommission all your ships while at war)
"Rush hour" (have 30 people visit your nation page in 24 hours)
"Pacifist" (have no military units for 1 week)
"USSR" (have at least 10 nukes in a nation with communist policies)
"Time to rebuild" (have lost 20,000 infrastructure in total)
"Self-suficient" (be under blockade for 1 week without suffering from starvation or running out of power)
"Migrant" (change continent)
"It's fine" (lose 8 wars simultaneously)
Edit :
"Violence breeds violence" (declare a war against someone you were already at war with two times before)
"Para bellum" (be fully militarised)