 Initially, British troops in the city comprised some 6,000-strong lightly armed British Indian soldiers from the 49th Infantry Brigade of the 23rd Indian Division.When the battle reached its peak, the British sent in additional troops which consisted of 24,000 fully armed soldiers from the 5th Indian Division, 24 US M4 Sherman medium tanks, along with a similar number of M3 Stuart light tanks, 24 battle-ready aircraft, together with 2 British Royal Navy cruiser ships and 3 accompanying destroyer escorts.Indonesian forces consisted of 20,000 soldiers from the newly formed "Tentara Keamanan Rakyat" (TKR; People's Security Armed Forces) from its East Java Regional Command and an estimated 100,000–120,000 irregulars and militias.