Indian Army's Assam Regiment 320 batch passing out and attestation parade on Date 18th April 2018.

Source wikipedia: The regiment was raised on 15 June 1941 in Shillong by Lt. Col. Ross Howman to meet the claim of the then undivided state of Assam for its own fighting unit and to counter the threat of the Japanese invasion of India. The area of Elephant Falls in Shillong was chosen to raise the first battalion and it was there, under British instructors, that the first troops were trained. The initial draft of the regiment was drawn from undivided Assam, and consisted of the doughty Ahoms who had proved their martial prowess by defeating the Mughals at the Battle of Saraighat and the hardy, tough and cheerful Nagas, Mizos, Kukis, Garos, Meiteis and other tribals. Later, the Adis, Nishis, Monpas, other tribes of Arunachal Pradesh, domiciled Gorkhas and Sikkimese were also drafted into the regiment and, today, the regiment can boast of being composed of troops of diverse customs, cultures, languages, traditions and ethos belonging to the seven states of the northeast and Sikkim.
Within six months of its raising, the regiment was ordered to move to Digboi to defend the oil fields. In early 1942, it moved to Ledo and was involved in reconnoitering the alignment for the famous Stilwell Road. In 1944, when the invasion of India by Japan was imminent, the regiment was moved to Jessami and Kharasom to delay the advance of the Japanese 31st Division. The young regiment soon proved its capabilities within three years of its raising, at the consecutive battles of Jessami, the epic defence of Kohima and the capture of Aradura, all of which were awarded as battle honours (now known as pre-independence battle honours) to the regiment. The regiment earned high praise for its combat skills in World War II. In its very first operation, the regiment won 71 gallantry awards. In addition, the regiment won six battle honours including Jessami, Kohima, Aradura, Toungoo, Kyaukmyaung bridge-head and Mawlaik. It was also awarded the theatre honour Burma: 1942-45. Seldom has a regiment won so many gallantry awards, battle honours and theatre awards in a single campaign.
Two battalions were part of the Indian Peace Keeping Forces in Sri Lanka in 1988 and a battalion served in Cambodia in 1993 as part of the United Nations Transitional Authority in Cambodia. Three Territorial Army (TA) battalions and three Rashtriya Rifles (RR) battalions are affiliated with the regiment. The unique cultural and tribal character of the regiment makes for a fine combination of cheerful, tough and willing soldiers who excel in operations in mountainous and jungle terrain. The regimental colours are black and gold (state colours of undivided Assam) and scarlet (the colour of the infantry). Badges are silver with black backings. The side arm is the 'Dah'. The regimental language is Hindi. When spoken in the regiment, it is a quaint and unique mixture of Hindi generously sprinkled with words from all the northeastern languages and sounds cryptic to the uninitiated.
The regiment, from a small group of three battalions at the time of independence, has now become a 22-battalion strong force with 15 regular battalions, three Rashtriya Rifles battalions, three Territorial Army battalions and 1 battalion of Arunachal Scouts. Since independence, battalions of the regiment have participated in the Sino-Indian War of 1962 and all the conflicts with Pakistan. The regiment was awarded a battle honour for its tenacious defence at Chaamb in the Indo-Pakistani War of 1971. Two of its battalions, 4 Assam and 7 Assam, have had the privilege of being part of the Indian Peace Keeping Force (IPKF) in Sri Lanka and 1 Assam, 15 Assam and 10 Assam have the unique distinction of being part of the UN Peace Keeping Force in Cambodia (UNTAC), Lebanon (UNIFIL) and the Democratic Republic of the Congo (MONUSCO) respectively.