It's about 350,000,000 times as long as World War II.
In other words, 2,000,000,000 years is 333,100,000 times the length of World War II, and the length of World War II is 0.0000000030020 times that amount.(a.k.a. Second World War, a.k.a. WWII, a.k.a. WW2) (1939 - 1945)
The most widespread war in history, the Second World War is generally considered to have started with the German invasion of Poland on September 1st, 1939 and to have until the surrender of Japan on September 2nd, 1945, a total of 6.004 years. Also the deadliest conflict in history, the war had an estimated 60 million casualties globally.
It's about 450,000,000 times as long as World War I.
In other words, 2,000,000,000 years is 457,000,000 times the length of World War I, and the length of World War I is 0.000000002190 times that amount.(a.k.a. First World War, a.k.a. Great War, a.k.a. World War, a.k.a. War to End All Wars, a.k.a. WWI, a.k.a. WW1) (1914 - 1918)
World War I is considered to have begun with the assassination of Austrian Archduke Franz Ferdinand on June 28th, 1914 and to have lasted until the signing of the armistice with Germany on November 11th, 1918, for a total of 4.370 years. However, the Treaty of Versailles which ended conflicts between the major powers was not signed until June 28th, 1919 and the last formal peace treaties were not signed until August 23rd, 1923 — 4.780 years after the armistice was signed.
It's about 450,000,000 times as long as The First walk around the world.
In other words, 2,000,000,000 years is 465,800,000 times the length of The First walk around the world, and the length of The First walk around the world is 0.0000000021470 times that amount.(1970 - 1974) (Dave, John, and Peter Kunst) (including time in recovery)
On June 20th, 1970, Dave Kunst set out from Waseca, Minnesota with $1,000 and a mule. Kunst completed his walk around the world (with a 0.33310 years pause following an assault he suffered during the journey) on October 5th, 1974 — 4.2930 years.
It's about 500,000,000 times as long as The Civil War (American).
In other words, 2,000,000,000 years is 501,000,000 times the length of The Civil War (American), and the length of The Civil War (American) is 0.00000000200 times that amount.(a.k.a. War Between the States, a.k.a. the Great Rebellion, a.k.a. the War of the Rebellion) (1861-65) (United States)
The deadliest war in American history, the American Civil War is generally considered to have begun on with the attack on Fort Sumter on April 12th, 1861 and to have lasted until the surrender of Robert E. Lee's army on April 9th, 1865 — 3.990 years. A total of 620,000 American (including Confederate) soldiers are estimated to have lost their lives due to the war.
It's about 650,000,000 times as long as The Korean War.
In other words, 2,000,000,000 years is 647,600,000 times the length of The Korean War, and the length of The Korean War is 0.0000000015440 times that amount.(1951-53) (to armistice signing)
The Korean War between North Korea (a.k.a. Democratic People's Republic of Korea, a.k.a. DPRK) and South Korea (a.k.a. Republic of Korea, a.k.a. ROK) began on June 25th, 1950 during the Cold War. The war paused with the signing of an armistice on July 27th, 1953 — 3.088 years — although the war is officially ongoing and marked by occasional border conflicts.
It's about 6,500,000,000 times as long as The First artificial heart patient's survival.
In other words, 2,000,000,000 years is 6,520,000,000 times the length of The First artificial heart patient's survival, and the length of The First artificial heart patient's survival is 0.0000000001530 times that amount.(1982) (Dr. Barney Bailey Clark; first permanent, pneumatic device)
On December 2nd, 1982 Dr. William DeVries implanted the first artificial heart into Dr. Barney Bailey Clark, who went on to live for 0.3070 years. This early model of the artificial heart was controlled and powered by an external, 146.51 kg (323 lb) machine that Dr. Clark had to cart with him as he moved throughout the hospital.
It's about 6,500,000,000 times as long as The Spanish-American War.
In other words, the length of The Spanish-American War is 0.0000000001490 times 2,000,000,000 years.(1898)
The War between Spain and the United States over the liberation of Cuba began on April 25th, 1898 and lasted until the signing of the Treaty of Paris on August 12th, 1898, 0.2960 years. The Treaty gave the United States control of Cuba, the Philippines, Puerto Rico, and Guam.