25 June: 

North Korea invades South Korea; UN Security Council meets.

26 June: 

US air and sea forces directed to assist South Korea. 

2 July: 

77 Squadron sent from Japan immediately in action; RAN ships in Korean waters. 

15 September: 

Successful UN amphibious landing at Inchon forces North Koreans to withdraw. 

28 September: 

US Marines recapture Seoul, capital of South Korea; 3rd Battalion, Royal Australian Regiment arrives. 

19 October: 

UN forces occupy Pyongyang, capital of North Korea. 

29 October: 

Australian 3rd Battalion drives enemy north as far as Chongju, just short of the Chinese border. 

1 November: 

First clash between Chinese and UN forces takes place on the Chinese border. 

5 December: 

North Koreans and Chinese re-occupy Pyongyang. RAN ships take part in gallant rescue of wounded UN troops and Korean refugees. 

January-March: 

UN abandons Seoul only to recapture it by 14 March. 

22 April: 

Chinese Spring offensive - human waves of soldiers attack the UN line just north of Seoul. 

23-24 April: 

Battle of Kapyong. 27 and 29 Brigades defeat superior strength Chinese force. 3rd Battalion RAR receives Presidential Citation for their part in the battle. 

21 May: 

Chinese offensive collapses. 

July-August: 

Unsuccessful cease-fire talks at Kaesong. 

3-8 October: 

Stalemate leads to the construction of trenches and heavily fortified defensive positions along the 38th Parallel. 

3 April: 

1st Battalion, Royal Australian Regiment, arrives. 

3 October: 

Australians advance their position 6000 yards taking the key Chinese defence points: Hills 217, 317 and 355. 

17 March: 

2nd Battalion, Royal Australian Regiment, arrives to replace 1st Battalion. 

26 April: 

Cease-fire talks resume at Pan mun jom. 

27 July: 

Cease-fire agreement signed at Pan mun jom.