In Africa and the Middle East, the violence killed thousands and displaced many others.
From Central Asia to the Americas, there were cartel wars, coups, border disputes, and skirmishes, some of which involved the world’s biggest military spenders.
We take a look at seven notable conflict zones and hot spots of 2020.
Tensions between the two powers flared during the northern summer, with fears that a protracted military conflict would break out.
The high-altitude confrontation between the Asian giants began in May with a fierce brawl and erupted into hand-to-hand combat with clubs, stones and fists on June 15 that left 20 Indian soldiers dead.
The territory has long been disputed, erupting into numerous minor conflicts and diplomatic disputes since the bloody war between the countries in 1962.
Afghanistan, the US and the Taliban
In what will be one of his final acts, President Donald Trump has asked to withdraw just over half of the 4,500 US troops in Afghanistan.
Some fear the withdrawal could potentially paralyze the Afghan National Army and trigger a resurgence of the Taliban.
Supermodel Naomi Campbell helped bring Western attention to the cause, sharing videos of the violence on her social media platforms.
Dozens of protesters were killed during widespread demonstrations, and the government was accused of covering up the bloodshed.
Amnesty International claims that SARS has been responsible for many cases of torture and killings. The Nigerian government has announced that it would dissolve the unit.
In 2020, violence escalated and hardships were compounded by torrential rains, a fuel crisis, COVID-19, and desert locust infestations.
The Saudi-led coalition, which includes the United Arab Emirates, has been accused of war crimes. The Kingdom believed that Iran was trying to gain a foothold in the Arabian Peninsula through the Houthi rebels in Yemen.
President Bashar al-Assad appears to have emerged victorious.
Syrian government forces have retaken much of Syria, with the backing of their allies Russia and Iran, helping to tip the balance of power in their favor.
But large areas remain outside the control of the government, mainly in the north near the Turkish border.
Nearly 7,000 people have disappeared in 2020 alone, likely buried in a shallow, shallow grave.
If not, it is very likely that the disappeared are hiding in mass graves.
From 2006 to 2020, Jalisco has exhumed the largest number of mass grave bodies of all the states of Mexico. There were 897 bodies exhumed in the state during that period, out of a total of 6,900 in the country.
Mexican drug cartels make between $ 25 billion and $ 39 billion annually from drug sales in the United States alone.
The dispute dates back to the collapse of the Soviet Union, when Nagorno Karabakh declared its independence from Azerbaijan, sparking a violent conflict that ended in a shaky ceasefire in 1994.
Armenia backed Nagorno Karabakh, which established a de facto independence that is not recognized by most of the world.
Although it is within the Azerbaijani territory, the region is populated and controlled by ethnic Armenians.
At the time of publication, a fragile truce had been negotiated.
Countries with the highest military spending in the world