The 1965 war witnessed some of the largest tank battles since World War II. At the beginning of the war, the Pakistani Army had both a numerical advantage in tanks, as well as better equipment overall. Pakistani armour was largely American-made; it consisted mainly of Patton M-47 andM-48 tanks, but also included many M4 Sherman tanks, some M24 Chaffee light tanks and M36 Jackson tank destroyers, equipped with 90 mm guns. The bulk of India's tank fleet were olderM4 Sherman tanks; some were up-gunned with the French high velocity CN 75 50 guns and could hold their own, whilst some older models were still equipped with the inferior 75 mm M3 L/40 gun. Besides the M4 tanks, India fielded the British-made Centurion Tank Mk 7, with the 105 mm Royal Ordnance L7 gun, and the AMX-13, PT-76, and M3 Stuart light tanks. Pakistan fielded a greater number and more modern artillery; its guns out-ranged those of the Indian artillery, according to Pakistan's Major General T.H. Malik.
At the outbreak of war in 1965, Pakistan had about 15 armoured cavalry regiments, each with about 45 tanks in three squadrons. Besides the Pattons, there were about 200 M4 Shermans re-armed with 76 mm guns, 150 M24 Chaffee light tank and a few independent squadrons of M36B1 tank destroyers. Most of these regiments served in Pakistan's two armoured divisions, the 1st and 6th Armoured divisions – the latter being in the process of formation.
The Indian Army of the time possessed 17 cavalry regiments, and in the 1950s had begun modernizing them by the acquisition of 164 AMX-13 light tanks and 188 Centurions. The remainder of the cavalry units were equipped with M4 Shermans and a small number of M3A3 Stuart light tanks. India had only a single armoured division, the 1st 'Black Elephant' Armoured Division, also called 'Fakhr-i-Hind' ('Pride of India'), which consisted of the 17th Cavalry (The Poona Horse), the 4th Hodson's Horse, the 16th 'Black Elephant' Cavalry, the 7th Light Cavalry, the2nd Lancers, the 18th Cavalry and the 62nd Cavalry, the two first named being equipped with Centurions. There was also the 2nd Independent Armoured Brigade, one of whose three regiments, the 3rd Cavalry, was also equipped with Centurions.
 Pakistan was outfought on the battlefield by India, which made progress into the Lahore-Sialkot sector, whilst halting Pakistan's counteroffensive on Amritsar.; they were sometimes employed in a faulty manner, such as charging prepared defenses during the defeat of Pakistan's 1st Armoured Division at Assal Uttar.
Although India's tank formations experienced same results, India's attack at the Battle of Chawinda, led by its 1st Armored Division and supporting units, was brought to a grinding halt by the newly raised 6th Armoured Division (ex-100th independent brigade group) in the Chawinda sector. The Indians lost 120 tanks at Chawinda. One true winner to emerge was India's Centurion battle tank, with its 105 mm gun and heavy armour, which proved superior to the overly complex Pattons and their exaggerated reputations..However, in the Sialkot sector outnumbered Pattons performed exceedingly well in the hands of the 25th Cavalry and other regiments of the 6th Armoured Division, which exacted a disproportionately heavy toll of Centurions from the Poona Horse and Hodson's Horse. The Indian Army has made much of the fact that some of its Centurions survived repeated hits; yet have failed to point out that the majority of tanks in the Sialkot sector were Shermans whose guns were inadequate even in 1944. Neither the Indian nor Pakistani Army showed any great facility in the use of armoured formations in offensive operations, whether the Pakistani 1st Armoured Division at Asal Uttar or the Indian 1st Armoured Division at Chawinda. In contrast, both proved adept with smaller forces in a defensive role such a the 2nd Armoured Brigade at Asal Uttar and the 25th Cavalry at Chawinda, where they defeated their better equipped but clumsier foes.