Chindits of 77th Indian Brigade stalk the enemy through dense jungle. The point man is holding his Lee-Enfield No. 4 rifle, but it was quickly realized that long-barrelled bolt-action rifles such as the No. 4 were of questionable value in the jungle, where ambush, or dealing with tree-based snipers, required a quick response and a high rate of return fire. The second soldier cradles a No. 5 Mk I jungle carbine. In an environment where every pound of additional weight carried drained a soldiers energy reserves, the short-barrelled No. 5 was less tiring to carry through jungle and easier to shoulder and fire quickly than previous Lee-Enfields, but it was always an unhappy compromise. 9mm submachine guns, normally ideal for close combat, simply did not have the bullet weight to punch through dense foliage, and the Commonwealth forces lacked a rifle-calibre selective-fire weapon such as the US .30in Browning Automatic Rifle (BAR). As a result, the addition of a Bren gunner to patrols was regarded as vitally important.