Security along the India-Nepal border in Bihar has been tightened up yet again and the boot is now being let out just a few kilometres over the border. The incident started off as a dispute over a loudspeaker and a flag in a tiny village called Kaptangj in a rural municipality in Sunsari district, but in a week has escalated into a multi-district crisis that led to the death of at least three people, sent Nepal's army to clamp down on demonstrators and forced curfews in four provinces of the Terai belt that borders Bihar and Uttar Pradesh in the south.

The spark, according to most of the local records, was quite pedestrian. A dispute over a DJ system that played music outside a temple at the end of the day on July 26 comes on top of a previous issue on the same day over a flag on a electricity pole that was owned by the Muslim community. They hurled rocks, fired warning shots and then live shots. A young man was killed on the scene. It was supposed to be a law and order issue but it degenerated and spread south and east to Saptari (covering parts of Rajbiraj municipality), Dhanusha, where a police constable was shot during a separate incident, and Parsa, where it borders Raxaul crossing in Bihar.

In India, the reaction has been the same. Madhubani, which has a long and famously porous border with Nepal, has sensitised all border police stations, beefed up vehicle checks and identity verification, and enhanced patrolling in coordination with Sashastra Seema Bal. The seven Bihar districts, including the Champaran district, which have a combined length of 726 kilometres on the India-Nepal border, are reportedly "taking similar measures". This is not ad lib. Bihar has followed this script during Madheshi agitation in 2015, Nepalgunj clash in January 2023, over a TikTok video in January 2023 and during the Gen Z movement that led to the fall of the Oli government last September. The choreography of curfews, flag marches and border alerts remains remarkably consistent, with the only change being the spark.

The political context in Kathmandu is also more significant in this round. Nepal has been four months in the rule of the government of Balendra Shah, the rapper-turned-mayor whose Rastriya Swatantra Party had triumphed because of the youth revolt which ousted the old order. The criticism now being heaped on his administration is why he was voted into office with the expectation that he would bring a fresh and more responsive administration to the state, something he has failed to deliver on. The security analysts and opposition forces in Nepal have noted clearly that the prime minister was not briefed by security forces chiefs for several days after the violence spread across three districts, the chiefs were only met by him after the violence and the prime minister assembled his National Security Council on the fifth day. The government, which is still in its infancy, is not only doing no favors to the government's credibility with its inaction during the crisis, but also has come out looking bad in the eyes of the public as it was elected to prevent a crisis like this.

There is a bigger picture that needs to be called out here: it isn't just one government. The Terai is becoming a flashpoint, specifically because it is the "border zone" between two very different political cultures: the Nepal federal state, which is still consolidating; and the open border regime between Nepal and India, which pre-dates the 1950 Treaty of Peace and Friendship, and still allows visa-free travel for citizens of both countries. This openness is a boon to the economy and a bane to the security guard.

The numbers tell how. India is Nepal's biggest trade partner, accounting for more than 81 per cent of Nepal's export and providing the majority of the supplies that Nepal imports whether refined fuel, cereals or medicine. The current figure of bilateral trade of merchandise is near 9.4 billion dollars in the Nepali fiscal year, while customs data of India reveals that petroleum products alone make up more than 2 billion dollars of the northbound trade. The Raxaul-Birgunj corridor is the busiest corridor and has more than 50 percent of all bilateral trade with more than 90 percent of the total cost of the twin Integrated Check Posts built on the Indian side at a cost of Rs. 140 crore. A prolonged curfew or a sealed crossing is not only a nuisance to commuters, it will also disrupt a network of rail and pipeline buildouts which have been under way for a decade by both governments the Jaynagar-Kurtha line, the proposed railway between Raxaul and Kathmandu, the petroleum pipeline between Motihari and Amlekhganj and the two governments have been trying to shield from just such a disruption.

Then there is that other, quieter side of the security briefings the hundreds of thousands of Nepalis who go to Bihar and Uttar Pradesh to work in the fields, and the Indian traders and pilgrims who go the other way, especially with the approach of the festival season of Chhath and the fall. Each time this border tightens, it is their movement, remittances and small trade which take the initial hit, long before a diplomatic note is exchanged.

None of that would mean that current unrest would grow to anything like the level of 2015. The physical spread has been prevented by curfews, at least now Kathmandu is engaged. But the episode is a reminder that the relationship can't be as economically entangled as that between India and Nepal, and that things that are communal can't be left to someone else's business. Each time the Terai is on fire, Bihar's border districts have to play both the role of a perimeter and economic lifeline, and that is a burden that requires greater attention than the reactive alert and patrol cycle being practiced.The donut chart shows that fuel accounts for nearly one-third of India's exports to Nepal, iron and steel for another one-third and machinery for 25%, while the schematic illustrates how the seven districts in Bihar in alert status are arranged along the belt that falls under the curfew, with Raxaul-Birgunj as the chokepoint for more than half of all bilateral trade.