Answer:
There were a lot of conflicts, but the most important ones were Balkan Wars, First and Second Moroccan Crisis, Russo-Japanese war, Italo-Turkish War.
Step-by-step explanation:
Before WW1 there were many conflicts that can be seen as introduction to WW1. They were mostly led between members of two great military alliances - Central Powers and Entente. Still, none of this countries were prepared to enter a larger conflict until the assassination of Franz Ferdinand.