I haven't watched a single decade in the last 50 years when the world was so peaceful that it didn't have any major war. Even though this space in timeline, starting from the end of 2nd world war to current time, can be termed as most peaceful in human history.
A look back :
70s : the world saw a bunch of communist wars, and in middle east it was arab-israel war.
80s : Afghan-Russia war, and Iraq-Iran war. In the west it was UK-Argentina war.
90s : Iraq-US war, aka 1st gulf war. Civil war in Afghanistan between Talibans and Mujahedin groups. And in Europe Bosnian war.
Then again, this decade was the most peaceful one that I have witnessed. Fall of communism, end of cold war, end of the fear of a nuclear war, de-militarization, de-nuclearalization. The future seemed so promising and peaceful. Everything ended on 2001, after world trade center attack.
2000s : Afghan-US war. Iraq-US war, 2nd gulf war.
2010s : Syrian civil war.
The coming decade for sure will come up with its new war on new frontiers. Cause, nothing ever ends. When-where-and-what that's the question.
Interestingly every decade had its share of a war in the middle east. The upcoming decade will have too.