The US-China trade war officially began on July 6, 2018, when the United States imposed tariffs on $34 billion worth of Chinese goods under Section 301 of the Trade Act of 1974. This action marked a significant escalation of economic tensions, initiating a period of retaliatory measures and profound shifts in global trade policy between the two largest economies.

The genesis of the trade war predates the specific July 2018 date, rooted in long-standing grievances from the United States regarding China's trade practices. Concerns included intellectual property theft, forced technology transfers, state subsidies for Chinese industries, and a persistent trade imbalance. The Trump administration initiated the Section 301 investigation in 2017, culminating in the tariff imposition aimed at compelling China to alter its policies. GeoGazet tracking highlights the significant attention on these dynamics, with "Tariffs & Trade" registering 74 tracked signals, "China" 45 signals, and "United States" 16 signals, indicating a sustained focus on this core bilateral relationship.

Following the initial US tariffs, China promptly retaliated with its own tariffs on American goods. This cycle of escalation broadened the scope of goods affected, impacting various sectors from agriculture to technology. The declared aim of US tariffs was to reduce the trade deficit and encourage domestic production; however, the actual outcomes have been complex. GeoGazet tracking has observed, for instance, how "US Tariffs Weaponized China's Exports," suggesting unintended consequences where Chinese exports might have adapted or diversified. Another signal, "Foreign trade zones helped companies avoid tariffs. That's changed under Trump," illustrates how policy shifts tightened avenues for tariff circumvention. Despite these measures, GeoGazet also noted, "China's exports to the US are surging at a pre-Liberation Day pace, defying Trump's tariff goals," indicating the resilience of trade flows and the difficulty of completely decoupling economies. The current influence score for this ongoing dynamic is 28/100, reflecting its moderate but persistent impact, alongside a comprehensive record of 100 total tracked events in the GeoGazet graph since its inception.