Number 1, The Treaty of Versailles, due to the fact it severely limited the German military, and made Germany pay large war reparations which destroyed the German economy.
After the defeat of Russia Japan focus on the expansion of its empire beginning with "China," since this presented them with the greatest potential in terms of harvesting natural resources.
The became engines because when ever the Europeans crossed ocean they wanted more land and started pushing native turfs and destroying the recourses but also not all hated Europeans
