LONDON (AP) 鈥 British Prime Minister Rishi Sunak pledged Monday to increase U.K. military funding by 5 billion pounds ($6 billion) over the next two years in response to Russia鈥檚 invasion of Ukraine and the 鈥渆poch-defining challenge鈥 posed by China.

The increase, part of a major update to U.K. foreign and defense policy, is less than military officials wanted. Sunak said the U.K. would increase military spending to 2.5% of gross domestic product 鈥渋n the longer term,鈥 but did not set a date. Britain currently spends just over 2% of GDP on defense, and military chiefs want it to rise to 3%.

The extra money will be used, in part, to replenish Britain鈥檚 ammunition stocks, depleted from supplying Ukraine in its defense against Russia. Some will also go towards to build nuclear-powered submarines.

U.S. President Joe Biden and Australian Prime Minister Anthony Albanese in San Diego on Monday to confirm next steps for the military pact, known as AUKUS, struck by the three countries in 2021 amid mounting concern about China鈥檚 actions in the Pacific.

Under the deal, new nuclear-powered, conventionally armed subs for Australia's forces are to be built in Australia and the U.K., with U.S. technology and support.

Britain last produced a defense, security and foreign policy framework, known as the Integrated Review, in 2021.

The government ordered an update in response to an increasingly volatile world. The new report, released Monday, said that 鈥渨e are now in a period of heightened risk and volatility that is likely to last beyond the 2030s.鈥

Moscow's February 2022 invasion of Ukraine upended European security order, and the review said Russia poses 鈥渢he most acute threat to the U.K.'s security.鈥

The U.K. is also increasingly concerned about what the government calls 鈥渢he epoch-defining challenge presented by the Chinese Communist Party鈥檚 increasingly concerning military, financial and diplomatic activity.鈥

The defense review said that "wherever the Chinese Communist Party鈥檚 actions and stated intent threaten the U.K.鈥檚 interests, we will take swift and robust action to protect them.鈥

Britain鈥檚 intelligence agencies have expressed growing concern about China鈥檚 military might, covert activities and economic muscle. Ken McCallum, head of , said in November that 鈥渢he activities of the Chinese Communist Party pose the most game-changing strategic challenge to the U.K.鈥

That concern has sparked a government-wide catch-up campaign on China, including Mandarin-language training for British officials and a push to secure new sources of critical minerals that are essential to technology.

The review does not brand China itself a threat to the U.K. and Sunak has stressed the need for economic ties with China, to the annoyance of more hawkish members of the governing Conservative Party.

Speaking as he travelled to the U.S., Sunak said China's Communist government 鈥渋s increasingly authoritarian at home and assertive abroad, and has a desire to reshape the world order.鈥

But, he added, 鈥測ou can鈥檛 ignore China鈥 given the size of its economy.

鈥淚t鈥檚 right to engage with China, on the issues that we can find common ground and make a difference on, for example climate change, global health, macroeconomic stability,鈥 he said.

鈥淭hat鈥檚 the right approach whilst being very robust in defending our values and our interests.鈥

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