Key Aspects of Subsidiary Alliance:
1. Military Protection: Princely states seeking protection entered into an alliance with the British. In return for security, the state accepted the stationing of British troops.

2. Loss of Autonomy: Princely states disbanded their armies, depending on British forces for defense, leading to a loss of military autonomy.

3. British Influence: Rulers had to seek British advice in diplomacy and governance, with a British Resident overseeing state affairs.

4. Financial Obligations: Princely states bore expenses for the maintenance of stationed British troops, creating a financial burden.

5. Expansion of British Control: The alliance expanded British political influence over several princely states, aiding in the gradual extension of British dominion in India without direct annexation.

The subsidiary alliance solidified British influence, enabling control over princely states while ostensibly providing protection, furthering British dominance in India.