The number of global major armed conflicts from 2018 to 2019 declined slightly compared to the previous year，and such conflicts were concentrated in the Middle East，Northeast Africa，and Southeast Asia. Global military expenditures in 2018 were higher than those in 2017. The amount of military expenditures in Central America and the Caribbean，North America，South America，Central and South Asia，West Asia，Central Europe，and Western Europe increased. In terms of military plans，NATO and Russia both maneuvered in their border areas，increasing tensions in the regional security situation. This year，there were no SCO joint anti-terrorism military exercises. China，India，and Japan continued to increase their military presence in their core interest areas. Some countries changed their national defense strategies according to both the global and regional security environments as well as their national defense objectives.