Study the source below carefully. Source A The following table shows the United States federal defence budget between 1949 and 1953. From official US govern...

This is a source utility question worth [8 marks]. To score highly, you must do three things: explain what the source tells you (its content), use your own knowledge to add context or challenge what it says, and evaluate its limitations as evidence for the specific claim in the question.

Analysing the source content [up to 4 marks]:

The source shows US federal defence spending rising from $13.2 billion in 1949 to $52.8 billion by 1953 - a near-fourfold increase. The sharpest jump occurs between 1950 ($14.3 billion) and 1951 ($33.4 billion), which more than doubles in a single year. This dramatic increase coincides exactly with the Korean War (1950-1953), the first major military conflict where the United States committed ground troops to stop communist expansion in Asia. The data therefore provides strong evidence that the US was prepared to allocate massive financial resources to containing communism on the Asian continent.

Using your own knowledge, you can explain why the spending surged. In June 1950, communist North Korea invaded South Korea. President Truman committed US forces under a United Nations mandate, viewing the invasion as a test of the containment doctrine first outlined in the Truman Doctrine of 1947. The spending figures reflect not just the cost of fighting in Korea but also a broader military buildup prompted by NSC-68, a 1950 policy document that called for a permanent increase in US military capacity worldwide.

Evaluating limitations [up to 4 marks]:

• Scope of the data: The source shows total defence spending, not spending specifically on containment in Asia. A significant portion went to NATO commitments in Europe, nuclear weapons development, and global military infrastructure. You cannot tell from these figures alone how much was directed at Asia.
• Nature of commitment: Financial spending shows economic commitment but not the willingness to risk American lives, political resolve, or military effectiveness. Containment also involved diplomatic and economic tools (such as aid to Japan, Taiwan, and the Philippines) that defence budgets do not capture.
• Time frame: The source covers only 1949-1953. It cannot show whether this level of commitment was sustained after the Korean War ended, or whether it extended to later challenges like the growing conflict in Vietnam.
• Provenance: As official US government budget records, the figures are likely accurate as raw data, but they were compiled for government accounting purposes, not to measure commitment to containment specifically.

Exam technique: For "how useful" questions, never say a source is simply "useful" or "not useful." Instead, explain what specific evidence it provides, then identify what it cannot tell you. The strongest answers connect the source content to precise historical knowledge and explain exactly why the limitations matter for the specific question asked.