How many soldiers in a regiment?

Answer This can vary depending on the Country and the Time period. WW2 - US Army An infantry regiment consisted of approximately 3000 men. The Infantry Division included 3 regiments and artillery and support units totalling 15,000 men. American Civil War - US The infantry regiment included 1000 men on paper. However, after a few battles the regiment was reduced to the size of 500 men or even down to as little as 250 men---espeically in the Confederate forces. Some of the Confederate regiments had to be consolidated into 1 unit, thus names like the 29/30th Mississippi Regiment. British - pre 1880 The British regiments were about the same size of the American's regiments in the Civil War. The British regiments were re-organized in 1880's and two numbered regiments were combined and given a territorial name, such as Bedforshire & Hertforshire Regiment. British - WW1 & WW2 British regiments grew in size to meet the need to supply troops to the large wars. The regiments created brigades, so that there was a 1st, 2nd, & 3rd Brigade within the regiment. The British local towns suffered greatly when a regiment experienced great battle losses. So the brigades were sent to different regions and campaigns. Then they created a training and a home defense brigade that would supply troops to the main figthing unit. Some well-known regiments grew as many as 12 brigades. Custermen