United we stand; Divided we fall.

Allies of World War I (1914–1918)
Allies of World War I
  •      Allied and Associated Powers (and their colonies)
  •      Central Powers (and their colonies)
  •      Neutral Powers
By Thomashwang at the English language Wikipedia, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=2389813

Allies of World War II (1939–1945)
Allies of World War II
  •      Allied Powers (and their colonies)
  •      Allies entering after the Attack on Pearl Harbor
  •      Axis Powers and co-belligerents
  •      Neutral Powers (and their colonies)
By Joaopais; See below., CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=505749

Examples of Unity among neighboring nations currently:

US - Canada
Russia - China
Srilanka - India
Member Nations of EU

We All know how above Nations stand united and got benefited.

Examples of Division among neighboring nations currently:

UK - EU [Brexit]
Pakistan - India
South Korea - North Korea
Ukraine - Russia
Palestine - Israel
Japan - China

Check Global Conflict Tracker below:

We All know how above Nations fall divided and suffer.

Allies of World War III (Love is forever ;)

Let us declare World Peace.

Let the whole world play Holi, a Hindu spring festival of colors until everyone is happy, contented and in LOVE with All. Love shells are cheaper than a bullet. GOD has given us life to live and let live, but not to kill and perish. Let All Nations across the world resolve their issues with their enemies diplomatically.