* Invasions due to overextension as far as territory to defend
== Roman Empire and nomadic invasions. China and its modern wars ==
'''Roman Empire and Nomadic Invasions:'''
*[[File:Roman Empire and nomadic invasions.png|center|800px|thumbnail|Source: [https://www.google.com/search?q=Roman+Empire+and+nomadic+invasions&sca_esv=812044cbe887b254&sxsrf=ADLYWILHsE1fP-_54AZp0wQ9TnDoP0lU4A%3A1736113691251&ei=G_56Z5iAD_mn0PEPl9Cg0Ag&ved=0ahUKEwjY-ey-x9-KAxX5EzQIHRcoCIoQ4dUDCBA&uact=5&oq=Roman+Empire+and+nomadic+invasions&gs_lp=Egxnd3Mtd2l6LXNlcnAiIlJvbWFuIEVtcGlyZSBhbmQgbm9tYWRpYyBpbnZhc2lvbnMyBRAhGKABMgUQIRigATIFECEYqwJI9f0CUJURWML5AnAseAGQAQSYAbsBoAH2UaoBBDAuNza4AQPIAQD4AQGYAm-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-QHCAiQQABiABBhGGPkBGJcFGIwFGN0EGEYY-QEY9AMY9QMY9gPYAQHCAgQQABgDwgIREC4YgAQYkQIYsQMY1AIYigXCAggQLhiABBjlBMICBxAuGIAEGArCAiAQLhiABBiRAhixAxjUAhiKBRiXBRjcBBjeBBjgBNgBAcICBxAjGLECGCfCAhAQABiABBixAxiDARiKBRgKwgIcEC4YgAQYsQMYgwEYChiXBRjcBBjeBBjgBNgBAcICChAAGIAEGBQYhwLCAgYQABgWGB7CAgsQABiABBiGAxiKBcICCBAAGKIEGIkFwgIHECEYoAEYCpgDC_EFNFIrUNelDKmIBgGQBgi6BgYIARABGAGSBwU0NC42N6AHsIoH&sclient=gws-wiz-serp Roman Empire and nomadic invasions] ]]
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'''China and modern wars:'''
"No country has more neighbours than China, with 14 land borders. And its neighbourhood is not just crowded, but also tumultuous." - [https://archive.is/2dxH4 Why China should be friendlier to its neighbours], ''The Economist'', 2023
<br />
<br />
[[File:China and modern wars.png|center|800px|thumbnail]]
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[[File:China and its modern wars.png|center|800px|thumbnail|Source: [https://www.google.com/search?q=what+modern+wars+has+China+got+involved+in&sca_esv=812044cbe887b254&sxsrf=ADLYWILXxFwtBdlR9nuIRcgWugY8mv8ELw%3A1736114582852&ei=lgF7Z7_UM_Wu0PEPx4yc6QM&ved=0ahUKEwi_9__nyt-KAxV1FzQIHUcGJz0Q4dUDCBA&uact=5&oq=what+modern+wars+has+China+got+involved+in&gs_lp=Egxnd3Mtd2l6LXNlcnAiKndoYXQgbW9kZXJuIHdhcnMgaGFzIENoaW5hIGdvdCBpbnZvbHZlZCBpbjIFECEYoAEyBRAhGKABMgUQIRigATIFECEYoAEyBRAhGKsCMgUQIRirAjIFECEYqwJIkpgBULwLWPyTAXAEeAGQAQCYAcoBoAGIPaoBBjAuNTEuMbgBA8gBAPgBAZgCK6ACgy_CAgoQABiwAxjWBBhHwgIFEAAY7wXCAggQABiABBiiBMICCBAAGKIEGIkFwgIEECEYCsICBRAhGJ8FmAMAiAYBkAYIkgcGNC4zOC4xoAfM-gE&sclient=gws-wiz-serp What modern wars has China got involved in?] ]]
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== China's decline and Roman Empire decline: Plagues ==
