World War 1 featured many powerful new weapons that significantly impacted battlefield tactics and strategies. Machine guns allowed for rapid fire of hundreds of rounds per minute and dominated battlefields. The massive Big Bertha cannon could fire 800kg shells up to 9 miles away. Sniper rifles, initially only issued by Germany, gave sharpshooters deadly long-range accuracy in the trenches. Flamethrowers brought terror when used early in the war by German forces against British and French soldiers.