This one is long, but packed to the brim with good stuff. It covers the causes of WWI, the changes in weaponry and tactics (or lack thereof), the strategies and eventual results of The Great War. There's also a few asides on such things as shell shock.

1. World War I

13. Franz

14. Franz’s wife, Sophie. They married for love.

15. Franz and Sophie arriving in Sarajevo.

16. Princep

17. Sophie was shot in the abdomen and Franz in the neck. They both die within 15 minutes.

18. The car. Princep, second from right, being arrested moments later.

20. Franz’s last words were, “ Sophie dear, don't die! Stay alive for our children!”

25. Steps for Loading a Muzzleloader 1. Measure powder charge. 2. Pour measured powder down barrel. 3. Place patch and ball on muzzle. 4. Tap ball into barrel with starter. 5. Take out ramrod. 6. Ram ball down barrel. 7. Be sure ball is completely seated. 8. Clear vent hole with pick if necessary. 9. On flintlock muzzleloader, pour powder into pan and close frizzen. 10. On percussion lock muzzleloader, place cap on nipple.

42. 5 round stripper clip 600 yds 2800 ft/sec .30-06 44.9" 8lb 11oz USA Springfield m1903 5 round clip 600 yds 2880 ft/sec 7.92mm (.312) 49.2" 9lb Germany Gewehr 98 10 round magazine 1,000 yds 2440 ft/sec 0.303 44.5" 8lb 11oz Britain Lee-Enfield Feed Eff Range Muzzle Vel Cartridge Length Weight Country Rifle

46. There was a water jacket around the barrel connected to a pump to dissipate heart. They’d still only last about two minutes without fresh cool water. Crews would sometimes use their own urine if water wasn’t available. This is a British Vickers.

48. John Browning’s version.

53. 15 inch howitzer

55. French 320mm gun. That’s a bore of 12.6 inches.

56. French 274mm gun. WWI gun used by the Germans in WWII and captured by the Americans.

71. WWI images. Warning for what’s next.

72. Modern images of mustard gas victim from the Iran-Iraq War.

75. There also two completely new weapons systems introduced: tanks and planes.

83. Sopwith Camel, the famous British fighter

84. This is the plane preferred by Snoopy

85. Spad XIII

86. Recon Plane – that’s a camera

87. Recon bomber

88. Oops.

89. British blimps, usually used for recon

90. German blimp getting bombed

92. The Red Baron’s type of plane, a Fokker Dr.1

94. The actual plane.

96. Top U.S. ace Eddie Rickenbacker with 26 victories.

118. Old trenchlines today.

125. It says, “50 yards from the German trenches.”

127. Some trenches were not well developed. Artillery duds.

131. Some scenes of No Man’s Land.

132. Note in these pictures how the vegetation has been destroyed and trees just stripped of foliage by artillery and gunfire.

136. You can see the enemy’s trench lines in the distance.

148. Warning: the next video may be a little hard to watch.

158. In the Battle of the Somme in July to November of 1916, there was about 1 million causalities, which included about 300,000 dead.

168. “ On the first of February, we intend to begin unrestricted submarine warfare. In spite of this, it is our intention to endeavour to keep the United States of America neutral. In the event of this not succeeding, we propose an alliance on the following basis with Mexico: That we shall make war together and make peace together. We shall give generous financial support, and an understanding on our part that Mexico is to reconquer the lost territory in New Mexico, Texas, and Arizona. The details of settlement are left to you. You are instructed to inform the President [of Mexico] of the above in the greatest confidence as soon as it is certain that there will be an outbreak of war with the United States and suggest that the President, on his own initiative, invite Japan to immediate adherence with this plan; at the same time, offer to mediate between Japan and ourselves. Please call to the attention of the President that the ruthless employment of our submarines now offers the prospect of compelling England to make peace in a few months.”