BEIRUT — The Lebanese army checkpoint at Khiam had three soldiers yesterday. Today it has 47.

That is what a ceasefire looks like when nobody trusts it to last.

Lebanon's fragile truce with Israel entered its third week Thursday, but the military buildup on both sides suggests commanders are preparing for the next round, not celebrating peace. The calm that has allowed 180,000 displaced Lebanese to return home masks a deeper problem: neither Hezbollah nor Israel believes this is over.

What the commanders are watching

Israeli forces have withdrawn from most Lebanese territory but maintain positions at 12 strategic points along the border. Hezbollah fighters have pulled back north of the Litani River as required. But weapons caches remain hidden in villages.

Everyone knows it.

"The infrastructure is intact," said Michael Knights, a senior fellow at the Washington Institute who tracks Hezbollah capabilities. "They moved the rockets, not destroyed them."

That calculation drives military thinking in Tel Aviv and Tehran. Supreme Leader Mojtaba Khamenei, who consolidated power after his father's death in February strikes, views Lebanon as Iran's forward defense line. Losing it means Israeli jets reach Iranian nuclear sites unopposed.

But the economics are brutal. Iran's war chest has shrunk by $40 billion since fighting began in October 2023, according to Pentagon estimates. Hezbollah's monthly operating costs — salaries, weapons, social services — run $200 million. Tehran cannot sustain that indefinitely.

The math is why Pakistan's mediation matters more than the Lebanon truce itself.

Why this round is different

Pakistani Foreign Minister Bilawal Bhutto-Zardari arrived in Beirut Wednesday carrying proposals that go beyond Lebanon. His team includes nuclear negotiators and oil ministry officials.

That is not about Hezbollah rockets.

The package links Lebanon's stability to Iran's nuclear program and oil exports. Hezbollah gets reconstruction funds. Iran gets limited sanctions relief. Israel gets monitoring mechanisms that make cheating costly.

"Pakistan is offering something Washington and Tehran both need — plausible deniability," said Vali Nasr, a Johns Hopkins professor who advised previous Iran negotiations. "Neither side can be seen making direct concessions."

The timeline is tight. Lebanese parliamentary elections are scheduled for May 15. Hezbollah's political wing faces its first real test since the war began. If reconstruction money flows, they claim victory. If villages stay destroyed, voters blame them.

Israeli Prime Minister Benjamin Netanyahu faces similar pressure. His war cabinet agreed to the Lebanon ceasefire partly because reservists were exhausted. But military chiefs warn that Hezbollah is rearming faster than intelligence predicted.

Nobody is saying this publicly. But the math is uncomfortable

Israel's northern communities remain largely evacuated despite the truce. Insurance companies refuse to cover businesses there.

The message is clear: this pause will not last.

Hezbollah's calculation is different but equally stark. The group lost an estimated 2,400 fighters, including most of its senior command structure. Replacing them takes years, not months. Fighting Israel again soon means losing permanently.

That creates space for Pakistani diplomacy that did not exist before. Both sides are militarily degraded but politically unable to admit defeat. Pakistan offers a face-saving exit that preserves core interests.

The proposal includes Iranian oil sales to Pakistan at below-market prices — effectively subsidized by Tehran but appearing as commercial deals. Those revenues fund Lebanon reconstruction through Pakistani development banks. Israel gets verification that money reaches civilians, not weapons programs.

But three things have to happen for this to work. None of them are guaranteed.

First, Trump must resist congressional pressure to expand Iran sanctions. Republicans want to strangle Iranian oil exports completely. That kills Pakistani mediation before it starts.

Second, Hezbollah's political leadership must convince fighters that standing down serves resistance goals better than fighting. That is a hard sell to men who lost commanders and territory.

Third, Netanyahu must explain to Israeli voters why Iran gets sanctions relief while rockets remain hidden in Lebanese villages. His coalition partners call that surrender.

The soldiers know what's coming

The Lebanese army's deployment offers a clue about confidence levels. Colonel Ahmad Nasser, the sector commander at Khiam, said his forces received orders to prepare for "extended operations."

Not peacekeeping. Operations.

His soldiers are digging defensive positions, not setting up traffic cones. They expect this truce to end badly.

The next Pakistani delegation arrives in Tehran on April 25. Iran's negotiating team will include oil ministry officials and Revolutionary Guard commanders — the same combination that suggests nuclear talks and military de-escalation are linked.

Whether Lebanon's calm survives that long depends on restraint from forces that have shown little of it. Israeli jets still fly over Beirut daily. Hezbollah still moves equipment at night. Both sides are following the ceasefire's letter while violating its spirit.

The families returning to southern Lebanese villages know this. They are rebuilding homes with one eye on the road north.